Vitamins & Supplements · Amino acid
Beta-alanine
Beta-alanine (3-aminopropanoic acid) · also called β-alanine, beta-alanina
Beta-alanine is an amino acid that muscle uses to make carnosine, a compound that helps cope with acid during hard exercise. Trials show it reliably raises muscle carnosine and gives a small average gain in hard efforts of about 1 to 10 minutes. Evidence is weak or against for body fat, strength in older adults and thinking skills. Tingling is the main side effect, and pregnancy and children have not been studied, so ask a doctor or pharmacist first.
General information, not medical advice. Last substantive update · Not medically reviewed. A named clinician has not signed off on this page. How this page is made
About Beta-alanine
Beta-alanine is an amino acid that is not used to build proteins. Muscle uses it to make carnosine. Pills reliably raise muscle carnosine and give a small gain in hard efforts, but they do not help every goal.
What beta-alanine is
Beta-alanine is an amino acid. Unlike most amino acids, it is not used to build proteins. Muscle combines it with histidine to make carnosine, a compound that helps muscle cope with acid during hard effort.
Beta-alanine is the part that limits how much carnosine muscle can make. That is why it is sold as a sports supplement. The ordinary science of carnosine is well established. Whether extra pills help a person is a separate question.
Food, vegetarians and carnosine
Meat and fish contain carnosine and related compounds. A 2012 review says that in meat eaters these are broken down and add to the beta-alanine supply, so muscle carnosine is two or more times higher than in vegetarians. In vegetarians, the review says muscle carnosine is limited by the liver making beta-alanine.
No amount per food portion is given here, because standard food tables do not list it and no source read gave one. No trial read compared food with pills for exercise results.
What the research shows
The strongest finding is that supplements raise muscle carnosine in nearly everyone (99.3% in one analysis). Meta-analyses then find a small average gain over placebo in hard efforts of about 1 to 10 minutes. There is little clear gain under a minute, and strength and power results are mixed.
Evidence is weak or against for body composition, strength in older adults and thinking skills. Blood-sugar and water-triggered itch findings come from a few studies or case reports.
Plain and slow-release forms
In a small trial in 11 healthy adults, a slow-release tablet gave a lower, slower blood peak than the same amount as a plain drink. The pins-and-needles feeling was much milder and could not be told apart from placebo with the tablet.
Reviewers have suggested that the pattern of servings may matter for strength and power, but this has not been tested head to head. Amounts used in trials are in the studies tables only.
At a glance
Traditional uses history, not proof
- Not a traditional remedy
- Sold as a sports supplement and in pre-workout products
Studied for research
- Raises carnosine in muscle, high certainty
- Hard efforts of about 1 to 10 minutes, moderate certainty
- Strength and power, mixed
- Repeated running (Yo-Yo test) and with sodium bicarbonate, low certainty
- Older adults, blood sugar and combat sports, low certainty
- Body fat, evidence against
- Thinking skills, soldiers and water-triggered itch, insufficient evidence
Main compounds
- Beta-alanine
- Carnosine (made from beta-alanine and histidine)
- Sustained-release beta-alanine
Common forms
- Powder, capsules and tablets
- Slow-release tablets
- Pre-workout and combined products
Research links: 2017 meta-analysis: beta-alanine and exercise (40 studies) · 2019 systematic review: safety of oral beta-alanine · 2015 sports-nutrition society position stand · 2020 review: how muscle carnosine responds · 2022 meta-analysis: body composition · Research Library · Genes & Biomarkers Library
What it is and its history
- Accepted scientific name
- Beta-alanine (3-aminopropanoic acid)
- Common names
- Beta-alanine (English); β-alanine (English (symbol)); 3-aminopropanoic acid (English (chemical)); Beta-alanina (Spanish)
- Family or group
- Amino acid. The existing summary says it is not a protein-building amino acid. A 2023 review calls it a nonessential amino acid that combines with histidine to make carnosine.
- Look-alikes and adulterants
- Name: Alanine (L-alanine); Note: A different amino acid used to build proteins; not the same as beta-alanine.; Name: Carnosine; Note: The compound muscle makes from beta-alanine and histidine; it is sold on its own as well.
- Sustainability and conservation
- Not assessed.
What is inside, and how it may work
What it contains and how those compounds act in cells and animals. Laboratory and animal mechanisms are not proven effects in people.
Main compounds
| Compound | Family | Where it is concentrated | Activity studied | Level of evidence |
|---|---|---|---|---|
| Beta-alanine PubChem 239 | amino acid | Not read from a source. | The limiting building block for carnosine in muscle. 18 10 | Human data |
| Carnosine PubChem 439224 | dipeptide (beta-alanine plus histidine) | Meat and fish (per existing summary; amounts not read) Not read from a source. | Helps muscle cope with acid; the 2012 review says carnosine in food adds to muscle levels in meat eaters. 10 3 | Human data |
| Sustained-release beta-alanine | supplement form | Not applicable. | A slower-release tablet; in a small trial it gave a lower, slower blood peak and milder tingling than the plain drink. 5 | Human data |
Mechanisms, receptors and pathways
| Target or pathway | Gene or receptor | What was found | Level |
|---|---|---|---|
| Carnosine synthesis in muscle | Not stated in the abstracts read | Beta-alanine is the scarce ingredient for carnosine. Supplements raise muscle carnosine; it falls back to starting levels after stopping. 18 10 22 | Human data |
| Acid buffering during hard effort | Not applicable | Carnosine helps buffer acid in muscle. How much this explains any exercise gain in people is not settled. 22 | Human and mechanism |
| Itch pathway (MrgprD neurons and mast cells) | MrgprD | Proposed explanation for the effect on water-triggered itch in a 2026 viewpoint; based on lab data and case reports. 17 | Lab and case report |
Absorption, metabolism and elimination
- Absorption
- In 11 healthy adults, 1.6 g as a plain drink peaked in the blood at about 30 minutes; the slow-release tablet peaked at about 1 hour at a lower level.
- Distribution
- Taken up into muscle, where it combines with histidine to make carnosine.
- Metabolism
- Used to make carnosine in muscle. Other pathways were not covered in the abstracts read.
- Elimination
- The slow-release tablet lost less in urine (202 vs 663 micromol) in the small trial.
- Bioavailability
- Whole-body retention was 98.9% (tablet) vs 96.3% (solution) in the small trial.
Isolated compounds versus whole extracts
Beta-alanine from pills is not the same as food. In meat eaters, carnosine and related compounds in food are broken down and add to the beta-alanine supply, and muscle carnosine is two or more times higher than in vegetarians (2012 review). Supplements raise muscle carnosine in both. No trial was read that compares food sources with pills for exercise results.
Nutritional composition
USDA FoodData Central does not list beta-alanine as a standard nutrient, so no amount per food portion is given. Foods with carnosine and related compounds are mainly meat and fish; amounts per portion were not read from any source.
1 high certainty1 moderate certainty1 mixed findings6 low certainty3 not enough evidence1 evidence against
What was looked at
The 13 benefits and uses checked for Beta-alanine, each with how strong the evidence is. Tap one to open it.
- Raises carnosine in muscleHigh certainty
- Exercise capacity in hard efforts of about 1 to 10 minutesModerate certainty
- Very short efforts (under about 1 minute)Low certainty
- Strength and powerMixed findings
- Taken together with sodium bicarbonateLow certainty
- Repeated running (Yo-Yo test)Low certainty
- Older adultsLow certainty
- Body weight, fat and lean massEvidence against
- Blood sugar controlLow certainty
- Thinking skills and stressNot enough evidence
- Soldiers and tactical performanceNot enough evidence
- Combat sport athletesLow certainty
- Water-triggered itch (aquagenic pruritus)Not enough evidence
Lab markers tracked in the studies
Carnosine in muscleExercise capacity (effect size)HbA1c (average blood sugar over about 3 months)Fat mass
What is Beta-alanine good for?
The main studied uses and how strong the human evidence is for each. Most trials are in healthy adults who exercise.
Benefits, one by one
Each card is a research question, not a promise. Tap a goal to filter. Open a card to see the studies, doses and limits.
Raises carnosine in muscle
High certaintyBeta-alanine is the part of carnosine that limits how much muscle can make. In studies, taking it raised muscle carnosine in almost everyone. This is a lab measure. It is not the same as feeling or performing better.
3 studiesStudied as oral beta-alanine powder, capsules or tablets; forms are n…
Studies, doses and limits
What the trials found
A 2020 systematic review with a model of dose and response found muscle can store much more carnosine than common plans reach, and that 99.3% of people responded. A 2012 review says carnosine returns to its starting level after stopping, with an estimated half-life of 5 to 9 weeks.
Results
Muscle carnosine rises in nearly everyone who takes beta-alanine, and falls back after stopping.
Effect sizes as reported
99.3% of people responded (95% credible interval 96.2 to 100); half-life after stopping estimated at 5 to 9 weeks.
Why this rating
High that carnosine rises (a measured, repeatable change). The rise is a lab marker and says nothing by itself about performance.
Form and dose studied
Studied as oral beta-alanine powder, capsules or tablets; forms are not compared here.
Who was studied
Mostly healthy adults, many of them trained.
Limits
The data are about muscle carnosine measured by samples or scans. Reviews were read from the abstract only.
Why researchers looked
Carnosine is a compound in muscle that helps cells cope with acid during hard effort. People ask whether beta-alanine pills raise it.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Established nutrition
Muscle makes carnosine from beta-alanine and histidine. Beta-alanine is the scarce ingredient. This is the established biology and the reason pills were developed.
A proposed mechanism does not show that the effect happens in people.
Tingling can occur; see the Safety tab.
Exercise capacity in hard efforts of about 1 to 10 minutes
Moderate certaintySeveral reviews of trials found a small average gain from beta-alanine over placebo in hard efforts lasting about 1 to 10 minutes. The gain is modest and varies between studies.
4 studiesOral beta-alanine, plain or sustained-release.
Studies, doses and limits
What the trials found
Saunders 2017 pooled 40 placebo-controlled studies in 1461 healthy people. Hobson 2012 pooled 15 studies in 360 people. Georgiou 2024 pooled 18 trials in 331 trained young men.
Results
Small average gains in exercise capacity. In the 2017 review the gain was larger for how long people could keep going (capacity) than for race-style performance. The 2012 review found a median gain of 2.85% in an exercise measure.
Effect sizes as reported
Saunders 2017 overall effect size 0.18 (95% CI 0.08 to 0.28); capacity 0.4998 (0.246 to 0.753) versus performance 0.1078 (-0.201 to 0.416). Georgiou 2024: 0.39 (0.09 to 0.69).
Why this rating
Our reading, not the reviewers' GRADE: three meta-analyses agree on a small gain, but they pool different tests and the gain is small.
Form and dose studied
Oral beta-alanine, plain or sustained-release.
Who was studied
Healthy adults, trained and untrained; trained young men in the 2024 review.
Limits
Small effect size. Results differ by test type and length. Abstracts only, so risk-of-bias detail was not checked.
Why researchers looked
Acid build-up in muscle is one thing that limits very hard effort. Carnosine helps buffer it, so people asked whether more carnosine means going longer.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials and mechanism
More carnosine may help muscle handle acid. Whether this is the main reason for any gain in people is not fully settled.
A proposed mechanism does not show that the effect happens in people.
Tingling is the main reported side effect.
Very short efforts (under about 1 minute)
Low certaintyReviews found little or no clear gain for efforts under about one minute.
2 studiesNot compared.
Studies, doses and limits
What the trials found
The 2012 review found no benefit for exercise lasting under 60 seconds (p = 0.312). The 2017 review found that exercise length changed the size of the effect.
Results
No clear gain in efforts under a minute.
Effect sizes as reported
Hobson 2012: p = 0.312 for under 60 seconds.
Why this rating
Low because the clearest statement comes from a 2012 abstract with 15 studies.
Form and dose studied
Not compared.
Who was studied
Healthy adults.
Limits
Older, smaller analysis; newer trials may differ.
Why researchers looked
People ask whether beta-alanine helps sprints and lifts.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Acid buffering matters less in very short efforts.
A proposed mechanism does not show that the effect happens in people.
None specific.
Strength and power
Mixed findingsResults for strength and power are mixed. Some studies show a gain and others do not.
2 studiesSplit servings and sustained-release forms were compared by the revie…
Studies, doses and limits
What the trials found
A 2025 systematic review of 9 studies in 197 resistance-trained people found inconsistent results. The reviewers noted that studies with split servings more often saw gains than those with sustained-release forms or single large servings. A 2023 review of 7 combat-sport trials reported better strength, power and work capacity.
Results
Mixed. Gains appear in some designs and not others.
Effect sizes as reported
No pooled numbers in the abstracts.
Why this rating
Mixed because the reviews are small, the studies differ in design, and the explanation about serving pattern is the reviewers' own idea.
Form and dose studied
Split servings and sustained-release forms were compared by the reviewers across studies, not in one trial.
Who was studied
Resistance-trained people; combat-sport athletes.
Limits
Few small studies; the reviewers' explanation is untested.
Why researchers looked
Lifters ask whether beta-alanine helps with gym performance.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Possible extra reps in sets that build up acid. Not shown directly.
A proposed mechanism does not show that the effect happens in people.
Tingling is the main reported side effect.
Taken together with sodium bicarbonate
Low certaintySome studies tested beta-alanine together with sodium bicarbonate, another acid buffer. A few found extra gain.
2 studiesNot compared.
Studies, doses and limits
What the trials found
Gilsanz 2023 reviewed 9 trials in 221 athletes. Five found extra benefit from the combination. One found it was about the sum of the two parts. Saunders 2017 found the largest effect size in studies that paired beta-alanine with bicarbonate.
Results
Possible extra gain in some studies; not consistent.
Effect sizes as reported
Saunders 2017 combined effect size 0.43 (95% CI 0.22 to 0.64).
Why this rating
Low: small varied studies, no pooled analysis in the 2023 review.
Form and dose studied
Not compared.
Who was studied
Athletes.
Limits
Different designs, small numbers. Stomach side effects of bicarbonate were not covered in the abstracts read.
Why researchers looked
Both are sold as buffers, so people ask if using both works better.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Two different buffers working together. This is an idea, tested in trials.
A proposed mechanism does not show that the effect happens in people.
Not assessed in the abstracts read.
Repeated running (Yo-Yo test)
Low certaintyIn athletes, beta-alanine did not clearly help the Yo-Yo test across all studies. It did in longer studies and in the harder version of the test.
1 studiesNot compared.
Studies, doses and limits
What the trials found
A 2021 meta-analysis of 10 study groups of athletes found no overall difference. Supplementation lasting 6 to 12 weeks and the level-2 test showed a benefit.
Results
No overall difference; benefit only in two subgroups.
Effect sizes as reported
All studies SMD 0.68 (95% CI -0.30 to 1.67); 6 to 12 weeks 1.02 (0.01 to 2.05); level 2 1.41 (0.35 to 2.48).
Why this rating
Low: only 10 groups, wide uncertainty, subgroup findings.
Form and dose studied
Not compared.
Who was studied
Athletes.
Limits
Small number; subgroup results.
Why researchers looked
The Yo-Yo test measures repeated sprinting, as in team sports.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Not studied in this meta-analysis.
A proposed mechanism does not show that the effect happens in people.
Not assessed.
Older adults
Low certaintyIn older adults, exercise capacity may improve a little. Muscle strength and everyday tasks did not clearly improve.
2 studiesNot compared.
Studies, doses and limits
What the trials found
A 2025 review of 5 trials in 163 adults (about 66 to 73 years) found exercise capacity may improve and strength and daily-task performance did not. A 12-week trial in 27 adults aged 60 to 82 found no effect of beta-alanine on any measure, even though exercise training itself helped.
Results
Possible small gain in exercise capacity; no gain in strength or function.
Effect sizes as reported
No pooled numbers.
Why this rating
Low: very few small trials.
Form and dose studied
Not compared.
Who was studied
Adults aged about 60 to 82.
Limits
Small trials; mixed results.
Why researchers looked
Muscle loss with age is a concern, so researchers tested beta-alanine in older people.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Same carnosine idea as in athletes; strength is not limited by acid in the same way.
A proposed mechanism does not show that the effect happens in people.
Tingling is the main reported side effect.
Body weight, fat and lean mass
Evidence againstA 2022 meta-analysis found beta-alanine did not change body weight, fat or lean mass.
2 studiesNot compared.
Studies, doses and limits
What the trials found
Twenty randomised trials with 492 people were pooled. Results were the same for different study lengths and amounts.
Results
No effect on weight, fat or lean mass.
Effect sizes as reported
Body mass -0.15 kg (95% CI -0.78 to 0.47); fat mass -0.24 kg (-1.16 to 0.68); body fat -0.06% (-0.53 to 0.40); fat-free mass 0.05 kg (-0.71 to 0.82).
Why this rating
The reviewers rated certainty low to moderate; the finding is evidence against an effect.
Form and dose studied
Not compared.
Who was studied
Mostly healthy people who trained.
Limits
No trial tested it with diet plus exercise as the main aim.
Why researchers looked
Some products are marketed for body shape.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
No clear mechanism for body composition.
A proposed mechanism does not show that the effect happens in people.
None specific.
Blood sugar control
Low certaintyA review pooling carnosine and beta-alanine found lower HbA1c and insulin resistance in a handful of human studies.
3 studiesBeta-alanine and carnosine were pooled.
Studies, doses and limits
What the trials found
A 2021 systematic review of 20 studies (4 in people, 16 in rodents) pooled carnosine and beta-alanine. In people, HbA1c, insulin resistance and fasting insulin were lower on average. A 3-month trial in 27 adults with overweight or obesity found the chance that beta-alanine changed cardiometabolic outcomes was low.
Results
Mixed: a favourable pooled signal from very few human studies, and a small trial with no clear effect.
Effect sizes as reported
Humans: HbA1c -0.91% (90% CrI -1.46 to -0.39); HOMA-IR SMD -0.41 (-0.82 to -0.07); fasting insulin SMD -0.41 (-0.77 to -0.07); fasting glucose -0.95 mmol/L (-2.1 to 0.08).
Why this rating
The reviewers rated certainty moderate for the human results, but only 4 human studies fed it and some used carnosine, so we rate it low.
Form and dose studied
Beta-alanine and carnosine were pooled.
Who was studied
Mostly people with diabetes-related conditions in the pooled review (not stated in detail in the abstract); adults with overweight or obesity in the 2025 trial.
Limits
Few human studies; mixed compounds; the 2025 trial was a small feasibility study.
Why researchers looked
Carnosine may protect against sugar-related damage in lab studies, so researchers looked at blood sugar.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Mechanism and human trials
Carnosine may reduce sugar-related damage in cells. This is lab-level reasoning.
A proposed mechanism does not show that the effect happens in people.
The 2025 trial found it well tolerated.
Thinking skills and stress
Not enough evidenceTwo small trials found no effect on thinking tests. Reviews call the evidence inconclusive.
3 studiesNot compared.
Studies, doses and limits
What the trials found
A 2015 study found no change in the brain carnosine signal in 14 people and no change in thinking tests in 19 cyclists. A 2020 trial in 19 men found no effect on thinking, stress symptoms or immune markers during a simulated military operation. A 2023 review calls the thinking results inconclusive.
Results
No clear benefit.
Why this rating
Insufficient because there are only a few small trials with no effect.
Form and dose studied
Not compared.
Who was studied
Healthy men.
Limits
Very small studies; short tests.
Why researchers looked
Carnosine is also found in the brain, so researchers asked about thinking and stress.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Mechanism and human trials
Carnosine in the brain may protect cells. Animal and lab ideas only.
A proposed mechanism does not show that the effect happens in people.
None specific.
Soldiers and tactical performance
Not enough evidenceSome authors suggest benefits for soldiers. A Department of Defense review did not support use by military personnel.
2 studiesNot compared.
Studies, doses and limits
What the trials found
A 2023 narrative review by researchers who study beta-alanine in soldiers says resilience ideas need more research. A 2014 Department of Defense review found limited evidence of benefit and did not support use by military personnel.
Results
Not supported by the strongest review.
Effect sizes as reported
No numbers in the abstracts.
Why this rating
Insufficient because few military studies exist and the two reviews differ in tone.
Form and dose studied
Not compared.
Who was studied
Soldiers and athletes.
Limits
Few military trials; one review is by authors in this field.
Why researchers looked
Armed forces looked into it for endurance and resilience.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Same buffering and carnosine ideas.
A proposed mechanism does not show that the effect happens in people.
Tingling rated moderate-strength evidence in the 2014 review.
Combat sport athletes
Low certaintySeven small trials in combat athletes reported better strength and work capacity.
1 studiesNot compared.
Studies, doses and limits
What the trials found
A 2023 systematic review of 7 trials reported better strength, power and total work capacity. Lean and fat mass changes were not significant.
Results
Possible benefit.
Effect sizes as reported
No pooled numbers.
Why this rating
Low: 7 small trials.
Form and dose studied
Not compared.
Who was studied
Combat athletes.
Limits
Few trials.
Why researchers looked
Fighting sports are repeated hard efforts.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Human trials
Same carnosine idea.
A proposed mechanism does not show that the effect happens in people.
The reviewers said it appears safe.
Water-triggered itch (aquagenic pruritus)
Not enough evidenceCase reports and a patient survey suggest it may ease this rare itch. It has not been tested in trials.
1 studiesNot compared.
Studies, doses and limits
What the trials found
A 2026 viewpoint reviews published case reports and a survey and proposes a mechanism.
Results
Possible, unproven.
Why this rating
Insufficient: case reports and a survey only.
Form and dose studied
Not compared.
Who was studied
People with water-triggered itch.
Limits
No controlled trial.
Why researchers looked
People with this rare itch have tried it.
Traditional use
Beta-alanine is a supplement ingredient sold for exercise. It is not a traditional remedy.
Proposed mechanism Case reports and mechanism
A proposed nerve and mast-cell pathway, based on lab data.
A proposed mechanism does not show that the effect happens in people.
Beta-alanine itself can cause tingling feelings; see the Safety tab.
Connections to the rest of health
How Beta-alanine connects to the rest of our health knowledge graph. Every link says what kind of connection it is. A safety link (for example to the liver) is a warning, not a benefit. A study that merely mentions a topic never creates a benefit link.
Explore every connection: goals, body systems, organs, symptoms, genes
A. Wellness goals
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Sports Performance | High certainty | Raises carnosine in muscle: Beta-alanine is the part of carnosine that limits how much muscle can make. In studies, taking it raised muscle carnosine in almost everyone. This is a lab measure. It is not the same as feeling or performing better. | 18 10 22 | |
| Sports Performance | Moderate certainty | Exercise capacity in hard efforts of about 1 to 10 minutes: Several reviews of trials found a small average gain from beta-alanine over placebo in hard efforts lasting about 1 to 10 minutes. The gain is modest and varies between studies. Very short efforts (under about 1 minute): Reviews found little or no clear gain for efforts under about one minute. | 19 11 7 22 15 6 8 9 | |
| Healthy Aging | Low certainty | Older adults: In older adults, exercise capacity may improve a little. Muscle strength and everyday tasks did not clearly improve. | 24 2 | |
| Healthy Weight | Evidence against | Body weight, fat and lean mass: A 2022 meta-analysis found beta-alanine did not change body weight, fat or lean mass. | 1 6 | |
| Metabolic Health | Low certainty | Blood sugar control: A review pooling carnosine and beta-alanine found lower HbA1c and insulin resistance in a handful of human studies. | 13 14 3 | |
| Cognitive Health | Not enough evidence | Thinking skills and stress: Two small trials found no effect on thinking tests. Reviews call the evidence inconclusive. | 21 23 16 | |
| Sports Performance | Not enough evidence | Soldiers and tactical performance: Some authors suggest benefits for soldiers. A Department of Defense review did not support use by military personnel. | 16 12 | |
| Skin Health | Not enough evidence | Water-triggered itch (aquagenic pruritus): Case reports and a patient survey suggest it may ease this rare itch. It has not been tested in trials. | 17 |
B. Body systems
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Muscular System | Biological association | High certainty | Studied for: Raises carnosine in muscle Studied for: Exercise capacity in hard efforts of about 1 to 10 minutes | 18 10 22 19 11 7 15 6 8 9 24 2 |
| Metabolism | Biological association | Evidence against | Studied for: Body weight, fat and lean mass Studied for: Blood sugar control | 1 6 13 14 3 |
| Nervous System | Biological association | Not enough evidence | Studied for: Thinking skills and stress | 21 23 16 |
| Whole Body | Biological association | Not enough evidence | Studied for: Soldiers and tactical performance | 16 12 |
| Skin | Biological association | Not enough evidence | Studied for: Water-triggered itch (aquagenic pruritus) | 17 |
I. Biomarkers
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Carnosine in muscle | Biological association | High certainty | Measured in trials: higher. A lab change is not the same as a health benefit. | 18 |
| Exercise capacity (effect size) | Biological association | Moderate certainty | Measured in trials: higher (small). A lab change is not the same as a health benefit. | 19 7 |
| HbA1c (average blood sugar over about 3 months) | Biological association | Low certainty | Measured in trials: lower (uncertain). A lab change is not the same as a health benefit. | 13 |
| Fat mass | Biological association | Low certainty | Measured in trials: no change. A lab change is not the same as a health benefit. | 1 |
K. Biological pathways
L. Active compounds
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Beta-alanine | Biological association | Human | The limiting building block for carnosine in muscle. | 18 10 |
| Carnosine | Biological association | Human | Helps muscle cope with acid; the 2012 review says carnosine in food adds to muscle levels in meat eaters. Preparation or compound: Meat and fish (per existing summary; amounts not read) |
10 3 |
| Sustained-release beta-alanine | Biological association | Human | A slower-release tablet; in a small trial it gave a lower, slower blood peak and milder tingling than the plain drink. | 5 |
Each connection is stored with the ingredient, the connected record, the kind of connection, the evidence status, the supporting studies, the preparation or compound involved, and a review date (last reviewed October 26, 2026).
Evidence at a glance: what the research found for 13 outcomes
Each outcome below is one thing researchers measured. Certainty is how far the evidence can be trusted, not how well it works. The full studies are on the next tab.
The evidence
The research centre for Beta-alanine. Every record here was checked against PubMed or the publisher's page; we never list a study we have not verified.
Evidence by outcome
Bars show how many studies we found for each outcome, not how well it works. People are added up across trials only (reviews are not added, to avoid double counting).
How we rate evidence
High certainty
Several well-run trials or reviews agree; further research is unlikely to change the picture much.
Moderate certainty
Good trials point the same way, but some doubt remains.
Low certainty
Small, short or inconsistent trials. The finding could change with better research.
Very low certainty
Very little or very weak human data. Treat as a possibility only.
Mixed findings
Trials or reviews disagree with each other.
Not enough evidence
Not enough human research to say either way.
Evidence against
Good research found no benefit, or found harm.
We take the reviewers' own risk-of-bias and GRADE statements where they exist, and otherwise judge from study size, design, consistency, directness and whether a product matches what is sold. Many publications do not make evidence high. Method note: We started from our existing beta-alanine summary, read PubMed abstracts for meta-analyses, trials and safety reviews, and checked chemical identifiers in PubChem. Only abstracts were read for studies. The NIH Office of Dietary Supplements page was blocked and is marked unread.
Study library: every study we checked 25
| Study | Design | People | Product, dose, length | Result |
|---|---|---|---|---|
| Ashtary-Larky 2022 Effects of beta-alanine supplementation on body composition: a GRADE-assessed systematic review and meta-analysis. J Int Soc Sports Nutr · PMID 35813845 · DOI |
Systematic review meta analysis |
492 20 randomised trials, mostly healthy people who trained |
Beta-alanine (oral supplement) Powder, capsule or tablet Subgroups below and at or above 6 g a day gave the same result Under 8 weeks and 8 weeks or more · vs Placebo |
Beta-alanine did not change body weight, fat mass, body fat percentage or fat-free mass. The authors rated the certainty low to moderate. Body mass -0.15 kg; fat mass -0.24 kg; body fat -0.06%; fat-free mass 0.05 kg (Body mass -0.78 to 0.47; fat mass -1.16 to 0.68; body fat -0.53 to 0.40; fat-free mass -0.71 to 0.82) Methods, limits and fundingOutcomes: Body mass, fat mass, body fat percentage, fat-free mass Limitations: No trial tested beta-alanine with diet and exercise for weight loss as the main aim. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Bailey 2018 Beta-Alanine Does Not Enhance the Effects of Resistance Training in Older Adults. J Diet Suppl · PMID 29336621 · DOI |
Randomised controlled trial |
27 Adults aged 60 to 82 (some with resistance training, some without) |
Beta-alanine (oral supplement) 3.2 g a day 12 weeks · vs Placebo |
Beta-alanine made no difference to any measure. The exercise programme itself improved leg strength and power. No beta-alanine effect (p over 0.05 for all measures) (Not reported in the abstract) Methods, limits and fundingOutcomes: Body measures, muscle strength and endurance, daily tasks Limitations: Small trial (27 people). Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Cesak 2023 Carnosine and Beta-Alanine Supplementation in Human Medicine: Narrative Review and Critical Assessment. Nutrients · PMID 37049610 · DOI |
Narrative review |
Narrative review of carnosine and beta-alanine in medicine | Beta-alanine (oral supplement) and carnosine |
The authors say some areas look helpful (for example muscle loss with age, thinking skills, diabetes markers). They say results for cataracts, heart disease, schizophrenia and autism are inconclusive. The review covers carnosine and related compounds as well as beta-alanine. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Carnosine and its relatives in several medical areas Limitations: A narrative review, not a systematic one. Many findings are about carnosine itself rather than beta-alanine pills. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Dolan 2019 A Systematic Risk Assessment and Meta-Analysis on the Use of Oral β-Alanine Supplementation. Adv Nutr · PMID 30980076 · DOI |
Systematic review meta analysis human and animal |
101 human and 50 animal studies of oral beta-alanine | Beta-alanine (oral supplement) Oral Varied; not compared in this summary Varied · vs Placebo |
Tingling was the only side effect reported. Dropout was similar to placebo. Liver enzyme ALT rose slightly but stayed in normal ranges. Muscle taurine and histidine did not change in people. In mice and rats, taurine fell only at high amounts in drinking water. The authors concluded no harm within the doses in the research. Tingling odds ratio 8.9; ALT effect size 0.274 (Tingling 2.2 to 32.6; ALT 0.04 to 0.527 (95% credible intervals)) Methods, limits and fundingOutcomes: Side effects, blood markers, muscle taurine and histidine, animal outcomes Limitations: Many studies were not designed to look for harm. Abstract only. Funding and conflicts: Listed as non-US-government research support; industry links not stated in the abstract. Read: abstract |
| Décombaz 2012 Effect of slow-release β-alanine tablets on absorption kinetics and paresthesia. Amino Acids · PMID 22139410 · DOI |
Randomised controlled trial |
11 Healthy adults |
Beta-alanine (oral supplement) (plain solution vs slow-release tablet) Solution or tablet 1.6 g single serving 6 hours of monitoring · vs Placebo |
The plain solution caused a fast, high blood peak and a pins-and-needles feeling. The slow-release tablet gave a lower, slower peak and symptoms that could not be told apart from placebo. Peak blood level 82 vs 248 micromol per litre (tablet vs solution) (p under 0.001 for the peak difference) Methods, limits and fundingOutcomes: Blood level and tingling Limitations: Only 11 people and a single serving. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Fernández-Lázaro 2023 β-Alanine Supplementation in Combat Sports: Evaluation of Sports Performance, Perception, and Anthropometric Parameters and Biochemical Markers-A Systematic Review of Clinical Trials. Nutrients · PMID 37686787 · DOI |
Systematic review |
7 trials in combat-sport athletes | Beta-alanine (oral supplement) Varied Varied · vs Placebo |
Strength, power, total work capacity and sport-specific measures improved. Carnosine rose. Changes in lean and fat mass were not significant. The reviewers called it appears safe. No pooled number (Not reported in the abstract) Methods, limits and fundingOutcomes: Strength, power, work capacity, carnosine, body measures Limitations: Only seven trials, mostly small. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Georgiou 2024 Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis. Int J Sport Nutr Exerc Metab · PMID 39032921 · DOI |
Systematic review meta analysis |
331 18 double-blind placebo-controlled trials in trained young men aged 18 to 40 |
Beta-alanine (oral supplement) Powder, capsule or tablet Subgroup of 5.6 to 6.4 g a day showed the clearest effect 4 weeks and longer · vs Placebo |
Beta-alanine gave a modest benefit over placebo in hard efforts of 0.5 to 10 minutes. The effect was clearest in efforts of 4 to 10 minutes and at 4 weeks. Overall effect size 0.39; 4-10 minute efforts 0.55 (Overall 0.09 to 0.69; 4-10 minute efforts 0.07 to 1.04) Methods, limits and fundingOutcomes: Maximal efforts lasting 0.5 to 10 minutes Limitations: Trained young men only, so it does not show what happens in women, older people or beginners. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Gilsanz 2023 Effect of β-alanine and sodium bicarbonate co-supplementation on the body's buffering capacity and sports performance: A systematic review. Crit Rev Food Sci Nutr · PMID 34882489 · DOI |
Systematic review |
221 9 randomised trials (at least single-blind) in athletes |
Beta-alanine (oral supplement) with sodium bicarbonate Powder, capsule or tablet Varied Varied · vs Beta-alanine alone, bicarbonate alone or placebo |
Five of nine studies found some extra gain when the two were combined. One found the combined effect was about the same as adding the two single effects. No pooled number (Not reported in the abstract) Methods, limits and fundingOutcomes: Buffering capacity and sports performance Limitations: Small, varied studies; no pooled analysis. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Grgic 2021 Effects of beta-alanine supplementation on Yo-Yo test performance: A meta-analysis. Clin Nutr ESPEN · PMID 34024507 · DOI |
Meta-analysis |
10 study groups of athletes (Yo-Yo running test) | Beta-alanine (oral supplement) Powder, capsule or tablet Varied Under 6 weeks, or 6 to 12 weeks in subgroup · vs Placebo or control |
Across all studies the difference was not significant. In studies lasting 6 to 12 weeks, and in the harder level-2 test, beta-alanine did better than placebo. All studies SMD 0.68; 6-12 weeks SMD 1.02; level-2 tests SMD 1.41 (All -0.30 to 1.67; 6-12 weeks 0.01 to 2.05; level 2 0.35 to 2.48) Methods, limits and fundingOutcomes: Yo-Yo test performance Limitations: Small number of studies; the confidence limits are wide, and the subgroups were chosen after the fact. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Harris 2012 Determinants of muscle carnosine content. Amino Acids · PMID 22327512 · DOI |
Narrative review |
Review of what sets muscle carnosine levels | Beta-alanine (oral supplement) |
Muscle carnosine depends on species and muscle fibre type. In vegetarians it is limited by the liver making beta-alanine. In meat eaters, carnosine and related compounds in food add to this, so muscle levels are two or more times higher. Supplements raise muscle carnosine, and it falls back to the starting level after stopping (half-life estimated at 5 to 9 weeks). Not applicable (Not applicable) Methods, limits and fundingOutcomes: Muscle carnosine Limitations: A review; human studies often do not control for diet or muscle fibre type. Abstract only. Funding and conflicts: Listed as non-US-government research support; industry links not stated in the abstract. Read: abstract |
| Hobson 2012 Effects of β-alanine supplementation on exercise performance: a meta-analysis. Amino Acids · PMID 22270875 · DOI |
Systematic review meta analysis |
360 15 published studies (23 exercise tests) in healthy people |
Beta-alanine (oral supplement) Powder, capsule or tablet Median total of 179 g across studies Varied · vs Placebo |
Beta-alanine did better than placebo overall. There was a benefit for exercise lasting 60 to 240 seconds and for exercise longer than 240 seconds, but no benefit for exercise under 60 seconds. Exercise capacity improved; exercise performance did not. Median effect size 0.374 (beta-alanine) vs 0.108 (placebo); median improvement 2.85% in an exercise measure (Interquartile ranges only: 0.140 to 0.747 vs -0.019 to 0.487; improvement range -0.37 to 10.49%) Methods, limits and fundingOutcomes: Exercise measures by duration Limitations: An early, smaller meta-analysis (2012); newer studies exist. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Ko 2014 Evidence-based evaluation of potential benefits and safety of beta-alanine supplementation for military personnel. Nutr Rev · PMID 24697258 · DOI |
Systematic review |
Studies and adverse-event reports reviewed for military use | Beta-alanine (oral supplement) Alone or in combined products |
The evidence on benefit was limited and most studies were not built to look at safety. The reviewers did not support use by military personnel. They rated the link between beta-alanine and tingling as moderate-strength evidence. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Benefit and safety for military personnel Limitations: Few studies of military people. Abstract only. Funding and conflicts: Sponsored by the US Department of Defense. Read: abstract |
| Matthews 2021 Effect of Carnosine or β-Alanine Supplementation on Markers of Glycemic Control and Insulin Resistance in Humans and Animals: A Systematic Review and Meta-analysis. Adv Nutr · PMID 34333586 · DOI |
Systematic review meta analysis human and rodent |
20 studies: 4 in people and 16 in rodents; carnosine or beta-alanine | Beta-alanine (oral supplement) or carnosine Varied · vs Placebo or control |
In people, the pooled results leaned towards lower HbA1c, insulin resistance and fasting insulin, with a fasting-glucose result that crossed zero. The reviewers rated the certainty moderate for the human results. Only four human studies fed this, and some used carnosine. Humans: HbA1c -0.91%; HOMA-IR SMD -0.41; fasting insulin SMD -0.41; fasting glucose -0.95 mmol/L (Humans, 90% credible intervals: HbA1c -1.46 to -0.39; HOMA-IR -0.82 to -0.07; insulin -0.77 to -0.07; glucose -2.1 to 0.08) Methods, limits and fundingOutcomes: Fasting glucose, HbA1c, insulin resistance Limitations: Very few human studies and carnosine and beta-alanine were pooled. Rodent results were rated very low certainty. Abstract only. Funding and conflicts: Listed as non-US-government research support; industry links not stated in the abstract. Read: abstract |
| Matthews 2025 β-alanine supplementation in adults with overweight and obesity: a randomized controlled feasibility trial. Obesity (Silver Spring) · PMID 39800667 · DOI |
Randomised controlled trial |
27 Adults with overweight or obesity, average age 58 |
Beta-alanine (oral supplement) (sustained-release) Tablet 4.8 g a day 3 months · vs Matched placebo |
Beta-alanine was well tolerated and people stuck with it. Side effects stayed at or below their starting level. The chance that it changed heart, metabolic or blood-chemistry outcomes was low. Adherence 0.92 (beta-alanine) vs 0.91 (placebo) (95% credible intervals: 0.85 to 0.95 and 0.84 to 0.95) Methods, limits and fundingOutcomes: Feasibility, tolerability, blood markers, blood pressure, heart scan measures Limitations: A small feasibility trial, not built to show benefit. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Ong 2025 Dosing strategies for β-alanine supplementation in strength and power performance: a systematic review. J Int Soc Sports Nutr · PMID 40995761 · DOI |
Systematic review |
197 9 studies in resistance-trained people |
Beta-alanine (oral supplement) Powder, capsule, tablet (sustained-release in some) Studies used about 4 to 6.4 g a day, some split into small servings 5 to 8 weeks typical · vs Placebo |
Results for strength and power were inconsistent. Some studies with split servings saw gains; studies using sustained-release forms, one large serving or low-stress training often saw none. No pooled number (Not reported in the abstract) Methods, limits and fundingOutcomes: Strength and power Limitations: Only 9 small studies with different designs. The reviewers' advice on dosing is their own conclusion, not tested head to head. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Ostfeld 2023 The Effect of β-Alanine Supplementation on Performance, Cognitive Function and Resiliency in Soldiers. Nutrients · PMID 36839397 · DOI |
Narrative review |
Review about soldiers and tactical performance | Beta-alanine (oral supplement) |
The authors say beta-alanine improves anaerobic muscle performance and that early work suggests it may add resilience to stress, brain injury and heat. They say the results on thinking skills are inconclusive. They call the resilience ideas interesting but needing more human research. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Performance, cognition and resilience in soldiers Limitations: A narrative review by authors who have worked on beta-alanine in soldiers. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Piserchio 2026 Beta-Alanine and Aquagenic Pruritus: Proposed Neuroimmune Mechanism. JMIR Dermatol · PMID 41880222 · DOI |
Viewpoint case reports |
Published case reports and a patient survey in aquagenic pruritus (water-triggered itch) | Beta-alanine (oral supplement) Oral |
The authors say case reports and a survey suggest oral beta-alanine may ease this rare itch, and propose a nerve and mast-cell explanation. This is a proposal that needs proper trials. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Itch after water contact Limitations: Case reports, a survey and lab data only. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Rezende 2020 The Muscle Carnosine Response to Beta-Alanine Supplementation: A Systematic Review With Bayesian Individual and Aggregate Data E-Max Model and Meta-Analysis. Front Physiol · PMID 32922303 · DOI |
Systematic review meta analysis |
99 Published group data on muscle carnosine plus individual data from 99 people studied in one lab |
Beta-alanine (oral supplement) Powder, capsule or tablet Varied; dose-response model Weeks of supplementation |
Muscle can store a lot more carnosine than usual supplement plans reach. Almost everyone who took beta-alanine had a rise in muscle carnosine (99.3% responded). Starting level and sex did not change the response. 99.3% responders (95% credible interval 96.2 to 100) Methods, limits and fundingOutcomes: Carnosine level in muscle Limitations: Carnosine was measured in muscle samples or scans, which is a lab measure and not an exercise result. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Saunders 2017 β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis. Br J Sports Med · PMID 27797728 · DOI |
Systematic review meta analysis |
1461 40 double-blind placebo-controlled studies (70 exercise measures) in healthy people |
Beta-alanine (oral supplement) Powder, capsule or tablet Varied by study; not compared in this summary Chronic daily intake (weeks) · vs Placebo |
Beta-alanine had a small overall effect on exercise. The effect depended on how long the exercise lasted and on the type of test. Effects were larger for exercise capacity (how long you can keep going) than for performance (such as a time trial). Overall effect size 0.18; capacity 0.4998 versus performance 0.1078; with sodium bicarbonate 0.43 (Overall 0.08 to 0.28; capacity 0.246 to 0.753; performance -0.201 to 0.416; with bicarbonate 0.22 to 0.64) Methods, limits and fundingOutcomes: Exercise capacity and performance Limitations: Healthy people only; cross-over trials were excluded; abstract only was read, so risk-of-bias detail is not known. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Saunders 2020 24-Week β-alanine ingestion does not affect muscle taurine or clinical blood parameters in healthy males. Eur J Nutr · PMID 30552505 · DOI |
Controlled trial |
25 Healthy men |
Beta-alanine (oral supplement) (sustained-release) Tablet 6.4 g a day 24 weeks · vs Placebo (maltodextrin) |
Muscle taurine did not change over time with beta-alanine. Kidney, liver and muscle markers did not change. No ongoing sensory side effects were reported. The placebo group had lower taurine from the start. No significant treatment, time or interaction effect (p over 0.05) (Not reported in the abstract) Methods, limits and fundingOutcomes: Muscle taurine, kidney, liver and muscle blood markers, side effects Limitations: Small trial in healthy men; only 24 weeks. A branded sustained-release product was used. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract; the paper names the product maker. Read: abstract |
| Solis 2015 Effects of beta-alanine supplementation on brain homocarnosine/carnosine signal and cognitive function: an exploratory study. PLoS One · PMID 25875297 · DOI |
Randomised controlled trial exploratory |
33 Study 1: 7 vegetarians and 7 omnivores; Study 2: 19 trained male cyclists |
Beta-alanine (oral supplement) 6.4 g a day 28 days · vs Placebo in study 2; before and after in study 1 |
Beta-alanine did not change the brain carnosine signal in vegetarians or omnivores. It did not change thinking tests before or after exercise in cyclists. No significant effect (p over 0.05) (Not reported in the abstract) Methods, limits and fundingOutcomes: Brain carnosine signal (MRI spectroscopy) and thinking tests Limitations: Very small exploratory studies. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Trexler 2015 International society of sports nutrition position stand: Beta-Alanine. J Int Soc Sports Nutr · PMID 26175657 · DOI |
Position statement review |
Narrative review by an expert panel | Beta-alanine (oral supplement) Powder, capsule, tablet, sustained-release Panel statement (4 to 6 g daily in the cited work) At least 2 to 4 weeks |
The panel said beta-alanine raised muscle carnosine in 4 weeks and appeared safe in healthy people. It said tingling was the only reported side effect. It said gains were shown for efforts of 1 to 4 minutes, and more research was needed on strength and on endurance beyond 25 minutes. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Muscle carnosine, performance and safety Limitations: An expert opinion statement from 2015, not a new analysis. The International Society of Sports Nutrition is a professional society, not a regulator. Abstract only. Funding and conflicts: Statement by the sports-nutrition society authors; funding not stated in the abstract. Read: abstract |
| Wells 2020 Effect of β-Alanine Supplementation on Monocyte Recruitment and Cognition During a 24-Hour Simulated Military Operation. J Strength Cond Res · PMID 33105353 · DOI |
Randomised controlled trial |
19 Healthy men in a simulated 24-hour military operation |
Beta-alanine (oral supplement) 12 g a day for 14 days (a high amount used for research) 14 days before a 24-hour test · vs Placebo |
Beta-alanine made no difference to thinking performance, stress symptoms or the immune-cell markers measured. Thinking scores fell in all groups late in the operation. No significant effect (p over 0.05) (Not reported in the abstract) Methods, limits and fundingOutcomes: Thinking tests, stress symptoms, immune-cell markers Limitations: Small trial; healthy men only; short simulated operation. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| de Camargo 2025 Beta-Alanine for Improving Exercise Capacity, Muscle Strength, and Functional Performance of Older Adults: A Systematic Review. J Aging Phys Act · PMID 39724872 · DOI |
Systematic review |
163 5 trials in adults aged about 66 to 73 |
Beta-alanine (oral supplement) Powder, capsule or tablet About 2.4 to 3.2 g a day in the trials About 12 weeks (average) · vs Placebo |
Exercise capacity may have improved. Muscle strength and daily-task performance did not seem to improve. No pooled number (Not reported in the abstract) Methods, limits and fundingOutcomes: Exercise capacity, strength and daily-task performance Limitations: Only five small trials; no pooled analysis. Abstract only. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| s-ods-exercise NIH Office of Dietary Supplements: Exercise and Athletic Performance fact sheet (health professional version) · Source |
Reference database n/a |
Methods, limits and fundingRead: not-read |
What we do not know yet
- The official NIH Office of Dietary Supplements page could not be read, so no upper limit is stated.
- No source covered pregnancy, breastfeeding or children.
- No source covered contamination or label accuracy.
- Food amounts of carnosine and beta-alanine were not found.
- Long-term use beyond about 24 weeks was not covered.
- Interactions with prescription medicines were not found.
How new research is added
New studies are found by a saved PubMed search and placed in a review queue before the page changes.
Lab markers
What changed in blood or saliva tests during trials. A changed number is not the same as feeling or being healthier, and we give no "normal ranges".
Metabolic 1
HbA1c (average blood sugar over about 3 months)
Lower (uncertain) in trials
A blood test that shows average blood sugar over the past few months.
Low certaintyResults and what it means
Why it was measured
To see if beta-alanine changes blood sugar.
Statistical vs. clinical meaning
Based on very few human studies.
Safety implication
No safety signal in this marker.
| Study | Result | People | Product |
|---|---|---|---|
| 13 | Humans: -0.91% (90% credible interval -1.46 to -0.39) | 4 human studies pooled with carnosine | Carnosine or beta-alanine |
Other 3
Carnosine in muscle
Higher in trials
The amount of carnosine in muscle, measured from muscle samples or scans.
High certaintyResults and what it means
Why it was measured
To see whether beta-alanine raises carnosine.
Statistical vs. clinical meaning
This is the reliable, expected effect of beta-alanine.
Safety implication
No safety information in this marker.
| Study | Result | People | Product |
|---|---|---|---|
| 18 | 99.3% of people had a rise (95% credible interval 96.2 to 100) | Published studies plus 99 people studied in one lab | Oral beta-alanine for weeks |
Exercise capacity (effect size)
Higher (small) in trials
A standard number showing how much better the beta-alanine group did than placebo.
Moderate certaintyResults and what it means
Why it was measured
To judge how big any gain is.
Statistical vs. clinical meaning
Small average effect. It is not a guarantee for any one person.
Safety implication
Tingling can occur.
Fat mass
No change in trials
Total body fat in kilograms.
Low certaintySafety
What studies and official sources say about side effects, medicines and who should check first. Each point shows what kind of evidence it comes from.
Main points to know 3
- Tingling (paraesthesia) is the one well-documented side effect. A 2019 systematic review of 101 human studies found tingling was the only reported side effect. People on beta-alanine were about nine times as likely to report it as people on placebo. It is a pins-and-needles feeling, often on the face, neck and hands. Dropout was similar to placebo. Meta-analysis 4 12
- Slow-release forms gave milder tingling in a small test. In 11 healthy adults, the same amount taken as a slow-release tablet gave a lower, slower rise in blood level and tingling that could not be told apart from placebo. The same amount as a plain drink gave a fast peak and clear pins and needles. Randomised trial 5
- Long-term safety data are limited. A 24-week trial in healthy men and the 2019 review found no harm to kidney, liver or muscle markers. These are mostly healthy adults. Pregnancy, breastfeeding, children and long-term use were not covered in the sources read. Ask a doctor or pharmacist before use. Randomised trial and meta analysis 20 4
Side effects 3
| Effect | How often | Severity and recovery | Evidence |
|---|---|---|---|
| Tingling, pins and needles, sometimes itching or flushing feelings A 2014 Department of Defense review rated the link between beta-alanine and tingling as moderate-strength evidence. | Odds ratio 8.9 (95% credible interval 2.2 to 32.6) versus placebo in a 2019 review. | Usually mild; described as unpleasant by some In the 2012 trial the sensation followed the blood level closely and was short-lived (first felt after about 15 minutes). | Meta analysis and randomised trial 4 5 |
| Small rise in the liver enzyme ALT In a 24-week trial in 25 healthy men, liver, kidney and muscle markers did not change. | Effect size 0.274 (95% credible interval 0.04 to 0.527); mean values stayed within clinical reference ranges. | Small; no harm shown Not stated. | Meta-analysis 4 |
| No other side effects were reported in trials read In adults with overweight or obesity, side effects stayed at or below their starting level over 3 months (27 people). | Not applicable | Not applicable Not applicable | Meta analysis, randomised trials 4 14 20 |
Liver
A 2019 review found a small rise in ALT that stayed within normal ranges. A 24-week trial in healthy men found no change in liver, kidney or muscle blood markers. No cases of liver injury from beta-alanine were found in the sources read. A liver-safety reference database (LiverTox) was not checked. 4 20
How often. No frequency of liver injury was found.
Monitoring. No agency monitoring advice was found.
This is a safety connection. It is not evidence that Beta-alanine supports liver health.
Medicines and supplements 3
| With | Why it matters | Importance | Evidence | What to do |
|---|---|---|---|---|
| Taurine (an amino acid) nutrient | In animal studies, high amounts of beta-alanine lowered muscle taurine, so researchers checked this in people. | In people, muscle taurine did not change significantly with beta-alanine in a pooled analysis or in a 24-week trial. In mice and rats, taurine fell only at high amounts in drinking water. | Meta analysis, randomised trial, animal Low certainty 4 20 | No action needed from these results; ask a pharmacist if you use many amino acids. |
| Sodium bicarbonate supplement | Both are used to buffer acid. | Studied for performance, not for harm. The abstracts read did not report safety problems; they also did not report stomach effects. | Systematic review Low certainty 8 | Ask a pharmacist, especially if you have kidney disease or take medicines affected by sodium. |
| Prescription medicines (general) prescription | Not studied in the sources read. | No interaction studies with prescription medicines were found in the sources read. Absence of evidence does not mean there is no interaction. | Gap Not enough evidence | Ask a doctor or pharmacist if you take regular medicines. |
Who should check first 4
| Situation | Advice | Evidence |
|---|---|---|
| Pregnancy and breastfeeding | No study or official statement on beta-alanine in pregnancy or breastfeeding was read. Ask a doctor or midwife before use. | Gap |
| Children and teenagers | No source read covered children. Ask a doctor first. | Gap |
| Kidney or liver disease | Trials were in healthy adults. Ask a doctor first. | Gap 4 |
| Military use | A 2014 Department of Defense review did not support use by military personnel, because evidence of benefit was limited and most studies were not designed to look at safety. | Systematic review 12 |
Overdose, product quality and regulators
Summary. In the research read, beta-alanine within the amounts used caused no serious harm. Tingling is the main effect. In animals, taurine in muscle fell when rodents were given high amounts in their drinking water.
Animal. Fifty animal studies were pooled in the 2019 review. Taurine in muscle fell in rodents only at high amounts in drinking water.
High dose or long term signals. A 24-week trial in healthy men found no changes in kidney, liver or muscle markers and no lasting sensory side effects.
Overdose response. Not found in the sources read.
Genotoxicity. Not researched.
No source on contamination or label accuracy of beta-alanine products was read.
Combined and pre-workout products. Beta-alanine is often mixed with other ingredients in sold products. The Department of Defense review looked at beta-alanine alone and in combination, and said most studies were not designed to look at safety. 12
| Body | Action | Date |
|---|---|---|
| International Society of Sports Nutrition (professional society, not a regulator) (International) | 2015 position stand: beta-alanine appears safe in healthy people at the amounts studied; tingling was the only reported side effect; more research is needed on other health effects. source | 2015 |
| US Department of Defense-sponsored evidence review (Nutrition Reviews) (United States) | 2014 review: evidence did not support use of beta-alanine by military personnel; tingling link rated moderate strength. source | 2014 |
When to get medical help
- Trouble breathing, swelling of the face, lips or throat, or a spreading rash after taking it: get emergency help.
- Tingling that spreads, will not stop, or comes with weakness, confusion, chest pain or fainting: stop and see a doctor.
- Yellow skin or eyes, dark urine or severe stomach pain: see a doctor.
Stop using the product and contact a clinician or emergency service. In the US, Poison Control is 1-800-222-1222.
General information only, not medical advice. Ask a clinician or pharmacist before use, especially with medicines, in pregnancy or with a health condition. See the Natural Remedy Safety guide.
Frequently asked questions
What is beta-alanine?
Does beta-alanine work for exercise?
Does it help very short efforts like sprints?
Why does beta-alanine cause tingling?
Is beta-alanine safe?
Does beta-alanine help older adults?
Does it burn fat or build muscle?
A 2022 meta-analysis of 20 trials found no effect on body weight, fat mass or lean mass.
Does it affect blood sugar?
Can vegetarians benefit more?
Does it improve thinking skills?
Can it be combined with sodium bicarbonate?
Five of nine studies in a 2023 review found some extra benefit from combining them. The studies were small and varied. Ask a pharmacist, especially with kidney disease or medicines affected by sodium.
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Editorial transparency
- Written by
- AlternativeMed editorial team. Research compiled with AI assistance, then checked against the sources listed.
- Medical review
- None. This page has not been reviewed by a physician or pharmacist.
- First published
- 2026-10-26
- Last substantive update
- 2026-10-26
- How we research
- We started from our existing beta-alanine summary, read PubMed abstracts for meta-analyses, trials and safety reviews, and checked chemical identifiers in PubChem. Only abstracts were read for studies. The NIH Office of Dietary Supplements page was blocked and is marked unread.
- How we rate evidence
- See "How we rate evidence" in the Evidence tab.
- Independence
- No product is promoted on this page. No affiliate links are shown. Trials of beta-alanine products may have manufacturer links not stated in abstracts.
Sources 25
Each source was opened and checked. Where we read only the abstract, it says so. The small numbers in the text point here.
- Ashtary-Larky D, Bagheri R, Ghanavati M, Asbaghi O, Wong A, Stout JR et al. Effects of beta-alanine supplementation on body composition: a GRADE-assessed systematic review and meta-analysis.. J Int Soc Sports Nutr. 2022. PMID 35813845. DOI 10.1080/15502783.2022.2079384. (abstract)
- Bailey CH, Signorile JF, Perry AC, Jacobs KA, Myers ND. Beta-Alanine Does Not Enhance the Effects of Resistance Training in Older Adults.. J Diet Suppl. 2018. PMID 29336621. DOI 10.1080/19390211.2017.1406422. (abstract)
- Cesak O, Vostalova J, Vidlar A, Bastlova P, Student V Jr. Carnosine and Beta-Alanine Supplementation in Human Medicine: Narrative Review and Critical Assessment.. Nutrients. 2023. PMID 37049610. DOI 10.3390/nu15071770. (abstract)
- Dolan E, Swinton PA, Painelli VS, Stephens Hemingway B, Mazzolani B, Infante Smaira F et al. A Systematic Risk Assessment and Meta-Analysis on the Use of Oral β-Alanine Supplementation.. Adv Nutr. 2019. PMID 30980076. DOI 10.1093/advances/nmy115. (abstract)
- Décombaz J, Beaumont M, Vuichoud J, Bouisset F, Stellingwerff T. Effect of slow-release β-alanine tablets on absorption kinetics and paresthesia.. Amino Acids. 2012. PMID 22139410. DOI 10.1007/s00726-011-1169-7. (abstract)
- Fernández-Lázaro D, Fiandor EM, García JF, Busto N, Santamaría-Peláez M, Gutiérrez-Abejón E et al. β-Alanine Supplementation in Combat Sports: Evaluation of Sports Performance, Perception, and Anthropometric Parameters and Biochemical Markers-A Systematic Review of Clinical Trials.. Nutrients. 2023. PMID 37686787. DOI 10.3390/nu15173755. (abstract)
- Georgiou GD, Antoniou K, Antoniou S, Michelekaki EA, Zare R, Ali Redha A et al. Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis.. Int J Sport Nutr Exerc Metab. 2024. PMID 39032921. DOI 10.1123/ijsnem.2024-0027. (abstract)
- Gilsanz L, López-Seoane J, Jiménez SL, Pareja-Galeano H. Effect of β-alanine and sodium bicarbonate co-supplementation on the body's buffering capacity and sports performance: A systematic review.. Crit Rev Food Sci Nutr. 2023. PMID 34882489. DOI 10.1080/10408398.2021.2012642. (abstract)
- Grgic J. Effects of beta-alanine supplementation on Yo-Yo test performance: A meta-analysis.. Clin Nutr ESPEN. 2021. PMID 34024507. DOI 10.1016/j.clnesp.2021.03.027. (abstract)
- Harris RC, Wise JA, Price KA, Kim HJ, Kim CK, Sale C. Determinants of muscle carnosine content.. Amino Acids. 2012. PMID 22327512. DOI 10.1007/s00726-012-1233-y. (abstract)
- Hobson RM, Saunders B, Ball G, Harris RC, Sale C. Effects of β-alanine supplementation on exercise performance: a meta-analysis.. Amino Acids. 2012. PMID 22270875. DOI 10.1007/s00726-011-1200-z. (abstract)
- Ko R, Low Dog T, Gorecki DK, Cantilena LR, Costello RB, Evans WJ et al. Evidence-based evaluation of potential benefits and safety of beta-alanine supplementation for military personnel.. Nutr Rev. 2014. PMID 24697258. DOI 10.1111/nure.12087. (abstract)
- Matthews JJ, Dolan E, Swinton PA, Santos L, Artioli GG, Turner MD et al. Effect of Carnosine or β-Alanine Supplementation on Markers of Glycemic Control and Insulin Resistance in Humans and Animals: A Systematic Review and Meta-analysis.. Adv Nutr. 2021. PMID 34333586. DOI 10.1093/advances/nmab087. (abstract)
- Matthews JJ, Creighton JV, Donaldson J, Swinton PA, Kyrou I, Bellary S et al. β-alanine supplementation in adults with overweight and obesity: a randomized controlled feasibility trial.. Obesity (Silver Spring). 2025. PMID 39800667. DOI 10.1002/oby.24204. (abstract)
- Ong SW, Chen WL, Chien KY, Hsu CW. Dosing strategies for β-alanine supplementation in strength and power performance: a systematic review.. J Int Soc Sports Nutr. 2025. PMID 40995761. DOI 10.1080/15502783.2025.2566368. (abstract)
- Ostfeld I, Hoffman JR. The Effect of β-Alanine Supplementation on Performance, Cognitive Function and Resiliency in Soldiers.. Nutrients. 2023. PMID 36839397. DOI 10.3390/nu15041039. (abstract)
- Piserchio N, Baratta B, Brooks B, Muse B, Ball K. Beta-Alanine and Aquagenic Pruritus: Proposed Neuroimmune Mechanism.. JMIR Dermatol. 2026. PMID 41880222. DOI 10.2196/90737. (abstract)
- Rezende NS, Swinton P, de Oliveira LF, da Silva RP, da Eira Silva V, Nemezio K et al. The Muscle Carnosine Response to Beta-Alanine Supplementation: A Systematic Review With Bayesian Individual and Aggregate Data E-Max Model and Meta-Analysis.. Front Physiol. 2020. PMID 32922303. DOI 10.3389/fphys.2020.00913. (abstract)
- Saunders B, Elliott-Sale K, Artioli GG, Swinton PA, Dolan E, Roschel H et al. β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis.. Br J Sports Med. 2017. PMID 27797728. DOI 10.1136/bjsports-2016-096396. (abstract)
- Saunders B, Franchi M, de Oliveira LF, da Eira Silva V, da Silva RP, de Salles Painelli V et al. 24-Week β-alanine ingestion does not affect muscle taurine or clinical blood parameters in healthy males.. Eur J Nutr. 2020. PMID 30552505. DOI 10.1007/s00394-018-1881-0. (abstract)
- Solis MY, Cooper S, Hobson RM, Artioli GG, Otaduy MC, Roschel H et al. Effects of beta-alanine supplementation on brain homocarnosine/carnosine signal and cognitive function: an exploratory study.. PLoS One. 2015. PMID 25875297. DOI 10.1371/journal.pone.0123857. (abstract)
- Trexler ET, Smith-Ryan AE, Stout JR, Hoffman JR, Wilborn CD, Sale C et al. International society of sports nutrition position stand: Beta-Alanine.. J Int Soc Sports Nutr. 2015. PMID 26175657. DOI 10.1186/s12970-015-0090-y. (abstract)
- Wells AJ, Varanoske AN, Coker NA, Kozlowski GJ, Frosti CL, Boffey D et al. Effect of β-Alanine Supplementation on Monocyte Recruitment and Cognition During a 24-Hour Simulated Military Operation.. J Strength Cond Res. 2020. PMID 33105353. DOI 10.1519/JSC.0000000000003809. (abstract)
- de Camargo JBB, Brigatto FA. Beta-Alanine for Improving Exercise Capacity, Muscle Strength, and Functional Performance of Older Adults: A Systematic Review.. J Aging Phys Act. 2025. PMID 39724872. DOI 10.1123/japa.2024-0118. (abstract)
- . NIH Office of Dietary Supplements: Exercise and Athletic Performance fact sheet (health professional version). . . (not-read)
Where to buy
Check the label first. Whatever you buy, look for these:
- The amount of the active ingredient per serving, not just the front-label claim
- A third-party testing mark (USP, NSF or ConsumerLab)
- Other ingredients and allergens
- Ask a pharmacist about interactions with your medicines
Talk to a pharmacist or doctor before you start any supplement, especially if you take medicines. See the Safety tab for interactions.
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