Support Your Heart & Circulation
Manage High Triglycerides
Triglycerides are a type of fat in the blood, and a blood test can show whether yours are above the usual range. This page is about the habits that influence triglycerides and the honest evidence on omega-3 and other supplements; overall cholesterol, blood pressure and general heart habits have their own pages.
General information, not medical advice. Last updated October 31, 2026. Written by the AlternativeMed editorial team. Not medically reviewed.
Start here
- Ask for your blood test numbers and note which range your triglycerides fall into; levels of 500 mg/dL or more need prompt medical advice.
- Cut back on added sugar, refined foods and alcohol, and replace some saturated fat with healthier fats.
- Move more most days and, if you are carrying extra weight, aim for gradual weight loss rather than a quick fix.
Be careful with
- Do not stop, reduce or swap a prescribed medicine because of anything on this page; if you take cholesterol or heart medicines, changes are for your prescriber to make.
- Over-the-counter fish oil is not the same as prescription omega-3 products, and higher amounts have been linked to a higher risk of an irregular heartbeat (atrial fibrillation) in large trials. Ask a doctor or pharmacist before taking it, especially if you take a blood thinner.
- Avoid claims that a supplement, detox or drink will 'flush' fat from the blood or 'unclog' arteries. We did not find trial evidence for these claims.
Get help when
- A triglyceride result of 500 mg/dL or more: very high levels raise the risk of sudden inflammation of the pancreas (pancreatitis), so a clinician should review it promptly.
- Severe, constant pain in the upper belly, especially with nausea or vomiting: get medical care urgently.
- Chest pain, pressure or tightness, breathlessness, fainting, weakness on one side, face droop or trouble speaking: these are emergencies; call your local emergency number.
- High triglycerides together with excessive thirst, frequent urination, weight changes, tiredness, or a family history of early heart disease or very high lipids.
About Manage High Triglycerides
What this goal means
Triglycerides are the most common type of fat in the body. They come from food, especially butter, oils and other fats, and from extra calories the body stores in fat cells until it needs energy. MedlinePlus gives these adult ranges in mg/dL: under 150 is healthy, 150 to 199 is borderline high, 200 to 499 is high, and 500 or more is very high.
Managing triglycerides means understanding which range you are in, what is pushing the number up, and which habits are worth changing. A single result can vary, so decisions are best made with your clinician.
1,2What it can feel like
High triglycerides usually cause no symptoms, which is why many people find out only from a routine blood test (often a lipid panel, sometimes after fasting for 9 to 12 hours if your provider asks). The CDC notes that high triglycerides together with low HDL cholesterol or high LDL cholesterol can increase the risk of heart attack and stroke.
Very high levels can cause sudden pancreatitis, which causes severe belly pain. That is a medical emergency, not a symptom to manage at home.
2,3What can push triglycerides up
MedlinePlus lists eating more calories than you burn (especially sugar), overweight or obesity, smoking, excessive alcohol, certain medicines, some genetic disorders, thyroid disease, poorly controlled type 2 diabetes, and liver or kidney disease. Diets high in fat, sugar and refined carbohydrates and a lack of exercise are also listed.
The medicines named on the MedlinePlus lab test page include some diuretics, breast cancer drugs and HIV drugs. Never stop a medicine on your own; ask your prescriber.
1,2Conditions that can sit behind it
Raised triglycerides often travel with other metabolic changes. A level of 150 mg/dL or higher is one of the risk factors for metabolic syndrome. If you also have extra weight around the waist, high blood sugar or high blood pressure, it is worth looking at the whole picture. Low thyroid function and diabetes that is not well controlled are other treatable causes that a doctor can check.
1,2Realistic expectations
Lifestyle changes are usually the first step that providers recommend, and some people also need medicine. In a meta-analysis of 148 trials, exercise training lowered triglycerides by about 8 mg/dL on average, a modest change; combined aerobic and resistance training was judged best for blood fats overall. Larger drops usually come from weight loss, less sugar and alcohol, treating an underlying cause, or medicines your doctor prescribes.
Your own response may be bigger or smaller than the average, so recheck with your clinician after a few months of consistent changes.
2,4Who this applies to
Adults who have been told their triglycerides are borderline high or high, or who want to avoid that. Children, pregnant people, people with kidney or liver disease, diabetes, or a strong family history of very high lipids need individual medical advice. For cholesterol (LDL and HDL), blood pressure and general heart habits, see the linked goal pages.
2Related conditions and symptoms
Prediabetes, type 2 diabetes and metabolic syndrome → Obesity and weight-related health → Sleep apnea → Thyroid and fatigue →
A manageable starting plan
An educational starting point, not a personal prescription. Adjust it to your own situation and any advice from your clinician.
Your first actions
- Get your latest triglyceride number and note its range; ask whether you need a repeat test.
- Cut sugary drinks and sweets first, then cut back on refined carbs and heavy drinking.
- Build up to regular activity most days, mixing walking or other aerobic activity with strength work.
- If you carry extra weight, aim for gradual weight loss with professional support.
Optional additions
- Eat fish more often in place of fatty processed meat.
- Swap some butter for olive oil or other plant oils, watching portions.
- If you smoke, ask for stop-smoking support.
- Talk with your clinician before trying fish oil or berberine.
What to track
- Your triglyceride, LDL, HDL and blood sugar results over time.
- Weight or waist measurement every few weeks.
- How many sugary drinks and alcoholic drinks you have each week.
- Any new medicine or supplement and any side effects.
When to reassess
Give lifestyle changes a few months, then repeat the blood test as your clinician advises. If levels stay high, or were 500 mg/dL or more to begin with, ask about next steps.
When to seek professional support
- See a doctor for any result of 500 mg/dL or more, or if you also have diabetes, thyroid, liver or kidney disease.
- Ask a dietitian for help with a realistic eating plan.
- Tell every clinician and pharmacist what supplements you take.
What helps
Ordered by how well the research supports each step. Evidence strength is shown on every card; precautions sit next to the advice.
Start here
Reach and keep a healthier weight, gradually
Moderate certaintyAddresses: Lowers one of the main drivers of high triglycerides
Why it may help: MedlinePlus lists controlling your weight first among the lifestyle steps for managing triglycerides, and overweight or obesity among the causes. Calorie intake above what you burn, especially from sugar, is named as a common cause.
How to apply it: Aim for steady, modest changes in eating and activity rather than crash diets. A clinician or dietitian can help set a safe pace.
Who it may suit: Adults whose triglycerides are above the usual range and who carry extra weight.
Precautions: Avoid crash diets or very low calorie plans. People with diabetes, pregnancy, an eating-disorder history, or on prescribed medicines should have clinician guidance.
1,2Limit added sugar, sugary drinks and refined carbohydrates
Moderate certaintyAddresses: Reduces a common dietary push on triglycerides
Why it may help: MedlinePlus names diets high in sugar and refined carbohydrates as a cause and recommends limiting added sugar and refined foods. A meta-analysis of controlled feeding trials found fructose swapped in for other carbohydrates at the same calories had no effect on triglycerides, but when it added extra calories to the diet (about 21% to 35% of energy) triglycerides rose. The practical message is that excess sugar calories matter.
How to apply it: Swap sugary drinks for water or unsweetened drinks, choose whole fruit and whole grains over sweets and white bread, and read labels for added sugars.
Who it may suit: Most adults with raised triglycerides, especially those who drink sugary beverages often.
Precautions: Whole fruit is not the target. If you have diabetes, coordinate changes with your care team.
2,1,5Limit alcohol
Moderate certaintyAddresses: Removes a known cause of raised triglycerides
Why it may help: MedlinePlus lists excessive alcohol use among the causes of high triglycerides and includes limiting alcohol in its lifestyle advice. A meta-analysis of intervention studies in adults without known heart disease found moderate drinking did not change triglyceride levels, so the concern is mainly with heavier drinking and with people whose levels are already high.
How to apply it: Keep to low-risk limits at most, and ask your clinician whether you should avoid alcohol altogether if your triglycerides are high or very high.
Who it may suit: Anyone who drinks regularly with raised triglycerides.
Precautions: If you drink heavily, do not stop suddenly without medical advice because withdrawal can be dangerous. Alcohol should be avoided in pregnancy.
1,2,6Move regularly, mixing aerobic and strength work
Moderate certaintyAddresses: Modest drop in triglycerides and better overall blood fats
Why it may help: Regular physical activity is part of MedlinePlus lifestyle advice for triglycerides. In a meta-analysis of 148 randomized trials (8,673 people), exercise training lowered triglycerides by about 8 mg/dL on average, with similar small improvements in LDL and HDL cholesterol. Combined aerobic and resistance training was judged best overall, and the authors noted the benefit did not appear in every study.
How to apply it: Build up gradually to activity most days of the week. Walking, cycling or swimming plus two sessions of strength work is a reasonable pattern.
Who it may suit: Most adults.
Precautions: Check with a clinician before starting vigorous exercise if you have heart disease, chest symptoms, diabetes or have been inactive for a long time.
1,4Sit Less & Move More → Improve Your Cardiovascular Fitness →
Replace some saturated fat with healthier fats
Moderate certaintyAddresses: Supports a heart-friendlier fat intake
Why it may help: MedlinePlus lists replacing saturated fats with healthier fats among its triglyceride measures, and NHLBI recommends no more than 10% of daily calories from saturated fat for blood cholesterol. Because fat is calorie-dense, portion size still matters.
How to apply it: Use olive oil or other plant oils in place of butter, and choose fish, nuts and seeds more often than fatty processed meats.
Who it may suit: Adults with high triglycerides, high cholesterol or both.
Precautions: Healthy fats still add calories. People on blood thinners should keep vitamin K intake steady rather than making sudden big changes to leafy greens.
1,7Stop smoking
Moderate certaintyAddresses: Removes another named contributor to high triglycerides
Why it may help: MedlinePlus lists smoking as a cause of high triglycerides and not smoking as part of lifestyle management. The CDC links high triglycerides with other lipid problems to a higher chance of heart attack and stroke.
How to apply it: Ask a clinician or pharmacist about stop-smoking support; combined support works better for many people than willpower alone.
Who it may suit: Anyone who smokes.
Precautions: Some people gain weight after quitting; plan gentle activity and eating habits alongside.
1,3Additional options
Eat fish rather than relying on pills
Low certaintyAddresses: Gets omega-3s in a whole food that replaces less healthy choices
Why it may help: NCCIH states that the evidence for benefits from seafood is stronger than the evidence for omega-3 supplements, and that people who eat seafood tend to have healthier lifestyles overall, so benefits cannot be put down to omega-3 alone. Fish can also take the place of fatty processed meats.
How to apply it: Include fish and shellfish in meals regularly; grilling, baking or steaming keeps added fat down.
Who it may suit: Adults who like fish and are not allergic.
Precautions: Pregnant or breastfeeding people should follow FDA and EPA advice (NCCIH quotes 8 to 12 ounces of seafood a week, favouring lower-mercury choices). Fish allergy: avoid.
8Sleep well and manage stress
Not enough evidenceAddresses: Supports the lifestyle changes above
Why it may help: MedlinePlus includes managing stress and getting enough sleep in its list of lifestyle measures providers recommend for high triglycerides, and NHLBI lists chronic stress and little or poor sleep among lifestyle factors that can affect blood fats. We did not find trials showing how much either one lowers triglycerides on its own.
How to apply it: Keep a regular sleep schedule and use a calming routine you can keep up.
Who it may suit: Anyone whose sleep or stress is hard to manage.
Precautions: Loud snoring or gasping at night can point to sleep apnea, which NHLBI lists as a condition to discuss with a doctor in relation to cholesterol.
2,7Intermittent fasting, if you choose it for weight loss
Low certaintyAddresses: Lipid changes that mostly follow weight loss
Why it may help: A network meta-analysis of 99 randomized trials (6,582 adults) found intermittent fasting and continuous calorie restriction both reduced body weight compared with unrestricted eating. Alternate-day fasting lowered triglycerides compared with time-restricted eating, but the summary we read does not show it beats ordinary calorie restriction for triglycerides.
How to apply it: Pick the eating pattern you can keep up. This is an option for weight loss, not a triglyceride treatment.
Who it may suit: Adults without diabetes on glucose-lowering medicines, who are not pregnant and have no eating-disorder history.
Precautions: Fasting is not suitable for pregnancy, under 18s, people with eating disorders, or people with diabetes who take medicines that can cause low blood sugar, unless a clinician guides it.
9Still being studied
Berberine
Low certaintyAddresses: Possible lowering of triglycerides in people with metabolic syndrome features
Why it may help: A 2025 meta-analysis of placebo-controlled trials in metabolic syndrome found berberine lowered triglycerides by about 0.37 mmol/L (roughly 32 mg/dL) compared with placebo, and also lowered fasting glucose and waist size, with no significant difference in side effects versus placebo. The authors called for more rigorous trials.
How to apply it: If you consider it, discuss it with your clinician first; we did not find a reliably sourced dose.
Who it may suit: Adults with metabolic syndrome who are working with a clinician.
Precautions: Can interact with medicines, including diabetes and blood-sugar medicines and other medicines processed by the liver; not for pregnancy or breastfeeding. Quality of products varies.
10Food & nutrition
A plate that fits high triglycerides
MedlinePlus recommends heart-healthy eating with limited added sugar, refined foods and saturated fat, and weight control. In practice that means plenty of vegetables, beans, whole grains, fish, nuts and seeds, with sweets, sugary drinks and white-flour foods kept for occasions.
There is no single food that lowers triglycerides on its own. Portion size matters because extra calories turn into stored fat.
1,2Fish and omega-3 from food
NCCIH reports that seafood evidence is stronger than evidence for omega-3 supplements, and that omega-3s lower triglycerides modestly. Fish also displaces fatty processed meat, which may be part of the benefit.
Pregnant and breastfeeding people should follow FDA and EPA seafood advice quoted by NCCIH (8 to 12 ounces a week, lower-mercury choices).
Fish and shellfish
Low certaintyAddresses: Omega-3 fats in a whole-food form
Why it may help: NCCIH finds the evidence for seafood stronger than for omega-3 pills for some conditions.
How to apply it: Regular fish meals, grilled, baked or steamed.
Who it may suit: Most adults who eat fish.
Precautions: Fish allergy; mercury in some fish for pregnancy and young children.
8Sugar and refined carbohydrates
The trial evidence on fructose shows the main problem is extra calories: when fructose replaced other carbohydrates at the same calorie level triglycerides did not change, but when it was added on top of the usual diet they rose. Sugary drinks are an easy place to cut calories. Choose whole fruit over juice and sweets, and fibre-rich whole grains over refined ones.
5,2Remedies & supplements
Traditional use, laboratory findings and human trials are kept apart. "Natural" does not mean safe.
Omega-3 fatty acids (fish oil)
Moderate certaintyStudied form and route: Capsules or liquid; prescription products differ from over-the-counter supplements
Intended outcome: Lower triglycerides
Human evidence: The AHA science advisory concluded that prescription omega-3 products at 4 g a day (more than 3 g of EPA plus DHA) are an effective and safe option for lowering triglycerides, by 30% or more in very high triglycerides, as the only treatment or added to other lipid medicines. NCCIH describes about a 15% reduction in a 2020 review of 23 studies for supplements generally, and notes prescription products may not match supplement effects.
Limits: The advisory refers to prescription products at pharmacological doses under medical supervision, not self-treatment with shop supplements. EPA plus DHA products raised LDL cholesterol in people with very high triglycerides in the advisory.
Interactions and precautions: A meta-analysis of 7 large trials found marine omega-3 supplements were linked to more atrial fibrillation, especially above 1 g per day. Ask about blood thinners and other medicines. Side effects are usually mild: taste, breath, heartburn, nausea, diarrhoea. Pregnant people should ask their clinician.
11,8,12Fish oil → Omega fatty acids explained → Medicine interactions →
Berberine
Low certaintyStudied form and route: Oral supplement (a plant alkaloid)
Intended outcome: Possible lowering of triglycerides and fasting glucose
Human evidence: A 2025 meta-analysis of placebo-controlled trials in metabolic syndrome reported lower triglycerides (about 0.37 mmol/L), lower fasting glucose and smaller waist circumference with berberine, with no significant difference in side effects compared with placebo.
Traditional use: Used in traditional medicine systems in plants such as barberry; the trials reviewed here tested purified supplements.
Limits: The authors call for larger, better-designed trials. Doses and products varied; we did not find a reliably sourced dose.
Interactions and precautions: May interact with medicines, particularly diabetes and other medicines processed by the liver. Not for pregnancy or breastfeeding. Ask your clinician or pharmacist first.
10Cod liver oil
Not enough evidenceStudied form and route: Oil or capsules
Intended outcome: None established for triglycerides beyond omega-3 content
Human evidence: NCCIH notes that fish liver oils contain vitamins A and D as well as omega-3s, and that these vitamins can be harmful in excessive amounts.
Limits: No trial in our reading shows an advantage over other omega-3 sources for triglycerides.
Interactions and precautions: Watch total vitamin A and D intake, especially in pregnancy.
8Therapies & care
Established care starts with a lipid blood test, a look for causes (thyroid, diabetes, liver, kidney, medicines, alcohol) and lifestyle support. MedlinePlus says some people also need medicine to lower triglycerides; the choice belongs to your clinician. This page does not recommend medicines or doses, and you should not stop a prescribed medicine on your own.
Lipid blood test and review of causes
High certaintyClinical assessment A triglycerides test, usually as part of a lipid panel, may require fasting for 9 to 12 hours if your provider asks. Your clinician can look at thyroid, blood sugar, kidney and liver function, alcohol use and your medicines.
Who it may suit: Anyone with a borderline, high or very high result, or with risk factors for heart disease.
Precautions: Follow fasting instructions only as given; do not skip prescribed medicines for the test unless told to.
2Dietitian or lifestyle programme
Moderate certaintyNutrition and behaviour support A registered dietitian can build a realistic plan for weight, sugar, alcohol and fat intake. MedlinePlus lists lifestyle change as the usual first step.
Who it may suit: Adults who want structured support, especially with weight or diabetes.
Precautions: Choose a qualified professional; avoid programmes promising rapid fat loss.
2,1Prescription triglyceride-lowering treatment
Moderate certaintyMedical treatment decided by a clinician Some people need medicine, including prescription omega-3 products, particularly with very high levels or other heart risks. The AHA advisory describes prescription omega-3s as one option, alone or with other lipid medicines.
Who it may suit: People for whom a clinician judges lifestyle change alone to be insufficient.
Precautions: Take only as prescribed, report side effects, and never stop without talking to your prescriber.
11,2Mind-body activity
Not enough evidenceMovement Gentle movement such as yoga or tai chi can help with staying active and managing stress. We did not find trials in our reading that measure their effect on triglycerides specifically.
Who it may suit: People who prefer gentle exercise.
Precautions: Choose a level that suits your health.
2What to avoid
Habits, products and claims that can get in the way. Never stop a prescribed medicine without talking to the professional who prescribed it.
Risks that apply to most people
Sugary drinks and extra sugar calories
Moderate certaintyWhy: Excess calories, especially from sugar, are a named cause of high triglycerides. In hypercaloric trials where fructose added extra energy, triglycerides rose in a meta-analysis.
Who it applies to: Anyone with borderline or high triglycerides.
Try instead: Water, sparkling water or unsweetened tea; whole fruit when you want something sweet.
1,5Heavy or binge drinking
Moderate certaintyWhy: Excessive alcohol is listed by MedlinePlus as a cause of high triglycerides; alcohol use disorder is also listed on its lab test page.
Who it applies to: People who drink heavily, and anyone whose triglycerides are 500 mg/dL or more.
Try instead: Ask your clinician how much, if any, alcohol is safe for you. Seek support if cutting down is hard.
1,2Smoking
Moderate certaintyWhy: Smoking is listed among the causes of high triglycerides.
Who it applies to: People who smoke.
Try instead: Ask for stop-smoking support from a clinician or pharmacist.
1Personal triggers to check
Medicines that can raise triglycerides, taken without review
Moderate certaintyWhy: MedlinePlus names certain medicines, such as some diuretics, breast cancer drugs and HIV drugs, as possible causes. NHLBI also lists some beta-blockers, diuretics and steroids when discussing blood cholesterol risk.
Who it applies to: People who started a medicine around the time their levels rose.
Try instead: Ask your prescriber or pharmacist to review it. Do not stop or change a prescribed medicine on your own.
2,7Untreated conditions that raise triglycerides
Moderate certaintyWhy: Thyroid disease, poorly controlled type 2 diabetes, and liver or kidney disease are all listed causes.
Who it applies to: People with known or suspected thyroid, diabetes, liver or kidney problems.
Try instead: Ask for these to be checked; treating the cause is often part of lowering triglycerides.
1,2Products that need caution
Over-the-counter fish oil at high amounts without advice
Moderate certaintyWhy: A meta-analysis of 7 large trials (81,210 people) found marine omega-3 supplements were linked to a higher risk of atrial fibrillation, with a larger risk in trials using more than 1 g per day. NCCIH also notes that over-the-counter supplements differ from prescription omega-3 products.
Who it applies to: Anyone taking fish oil capsules, especially at high amounts, with heart rhythm problems or on blood thinners.
Try instead: Ask a doctor whether a prescription omega-3 product is right for you, and tell them what you already take.
12,8Cod liver oil as an omega-3 source in large amounts
Moderate certaintyWhy: NCCIH notes that fish liver oils such as cod liver oil also contain vitamins A and D, which can be harmful in excessive amounts.
Who it applies to: People using cod liver oil daily, and pregnant people.
Try instead: Check the label and ask a pharmacist about total vitamin A and D intake.
8Unsupported claims
"Natural cures that flush fat out of your blood"
Evidence againstWhy: We did not find trials showing that detoxes, cleanses or single foods dramatically lower triglycerides. The evidence we found supports lifestyle changes with modest, gradual effects.
Who it applies to: Social media and product marketing.
Try instead: Rely on weight, sugar, alcohol and activity changes and check results with a blood test.
4,2"Fish oil lowers triglycerides so it must protect your heart"
Moderate certaintyWhy: Omega-3s lower triglycerides modestly (about 15% in a review cited by NCCIH), but that does not mean a supplement prevents heart attacks; the heart benefit in the AHA advisory was shown for a prescription product in high-risk people also taking a statin.
Who it applies to: Anyone buying fish oil for heart protection.
Try instead: Discuss your overall risk with your clinician rather than self-treating.
8,11Common mistakes
Cutting all fat but keeping sugar and refined carbs high
Moderate certaintyWhy: MedlinePlus names sugar and refined carbohydrates as drivers of triglycerides, alongside fat. Replacing fat with refined carbs does not remove the main dietary push.
Who it applies to: People following 'low-fat' or 'fat-free' products.
Try instead: Look at the whole plate: fewer sugary and refined foods, healthier fats in sensible portions.
1,2Treating one test result as final
Low certaintyWhy: Triglycerides can be affected by whether you fasted and by recent meals, alcohol and illness. Your provider will say whether fasting is needed.
Who it applies to: Anyone who has had a single result.
Try instead: Ask your clinician about repeating the test after a few months of consistent changes.
2Evidence & safety
What the research shows
Health agencies agree that high triglycerides are influenced by weight, sugar and refined carbohydrates, alcohol, smoking, inactivity, certain medicines and conditions such as diabetes and thyroid disease, and that lifestyle change is the usual first step, with medicine for some people. Exercise training gives a modest average fall in triglycerides in a large meta-analysis. Prescription omega-3 products lower triglycerides substantially in people with very high levels under medical care, while over-the-counter fish oil has a smaller effect and has been linked to more atrial fibrillation in large trials. Berberine shows promise in one meta-analysis but needs better trials.
Limits of the evidence
- Several lifestyle recommendations come from health-agency guidance rather than trials that measured triglycerides directly.
- The exercise meta-analysis found improvement in only about a quarter of studies, and the average effect was modest.
- The fructose analyses had small samples, short follow-up and low quality scores.
- The berberine meta-analysis pooled trials of varying quality and the authors asked for more rigorous studies.
- Prescription omega-3 findings do not automatically apply to shop supplements.
Precautions and interactions
- Check supplements with a pharmacist if you take any medicine, especially blood thinners or diabetes medicines.
- Never stop, reduce or replace a prescribed medicine without talking to your prescriber.
- Fish oil: report palpitations or an irregular heartbeat to a doctor.
Life-stage considerations
- Pregnancy and breastfeeding: avoid berberine; follow FDA and EPA seafood advice (8 to 12 ounces a week of lower-mercury fish, per NCCIH); ask a clinician before omega-3 supplements or cod liver oil.
- Children and teenagers: raised lipids need paediatric advice; do not give supplements without it.
- Older adults: more likely to take several medicines, so check interactions before adding supplements.
Warning signs
- Triglycerides of 500 mg/dL or more.
- Severe belly pain that does not settle, especially with vomiting.
- Chest pain, pressure or tightness, breathlessness, fainting, one-sided weakness, face droop or speech trouble: call emergency services.
- Palpitations or an irregular heartbeat after starting a supplement.
Claim checks
Fish oil capsules fix high triglycerides
Moderate certaintyPrescription omega-3 at 4 g a day lowered very high triglycerides by 30% or more in trials summarised by the AHA, but NCCIH describes about a 15% fall overall for supplements, and large trials linked marine omega-3 supplements to more atrial fibrillation.
11,8,12Fructose or fruit sugar is uniquely bad for triglycerides
Moderate certaintyIn controlled feeding trials, swapping fructose for other carbohydrates at the same calories did not change triglycerides; excess calories from added fructose did raise them.
5Moderate alcohol raises triglycerides in healthy adults
Moderate certaintyA meta-analysis of intervention studies in adults without known heart disease found moderate alcohol did not affect triglycerides, but excessive alcohol is a recognised cause of high levels.
6,1Berberine is as good as medicine
Low certaintyWe did not find trials comparing berberine with prescription treatment for triglycerides. One meta-analysis found a lowering versus placebo, with calls for better trials.
10Detoxes or cleanses lower triglycerides
Evidence againstNo trial evidence was found in our reading; lifestyle changes have the best support.
2Questions people ask
What is a normal triglyceride level?
MedlinePlus gives adult ranges in mg/dL: under 150 is healthy, 150 to 199 is borderline high, 200 to 499 is high, and 500 or more is very high. Your clinician interprets your result with your other risks.
Do I need to fast before the test?
MedlinePlus says you may need to avoid food and drink for 9 to 12 hours before the blood draw. Your provider will tell you if fasting is required.
Why are very high triglycerides dangerous?
Levels of 500 mg/dL or more raise the risk of sudden inflammation of the pancreas (pancreatitis), which causes severe belly pain. Very high levels need prompt medical review.
What lifestyle changes help most?
MedlinePlus lists controlling weight, regular activity, not smoking, limiting sugar, refined foods and alcohol, and replacing saturated fat with healthier fats. Some people also need medicine.
Does sugar really raise triglycerides?
Sugar and refined carbohydrates are named as causes by MedlinePlus. In controlled trials, extra calories from added fructose raised triglycerides, while swapping it for other carbohydrates at the same calories did not.
Is alcohol a problem?
Excessive alcohol is a recognised cause of high triglycerides. One meta-analysis found moderate drinking did not change triglycerides in adults without heart disease, but if yours are high, ask your clinician whether to avoid alcohol.
How much will exercise lower my triglycerides?
In a meta-analysis of 148 trials the average fall was about 8 mg/dL, a modest change, with combined aerobic and strength training judged best overall for blood fats.
Should I take fish oil?
Ask your doctor. Prescription omega-3 products are used for very high triglycerides, but over-the-counter fish oil has a smaller effect, and large trials linked marine omega-3 supplements to a higher risk of atrial fibrillation, particularly above 1 g a day.
Is eating fish better than taking pills?
NCCIH states that the evidence for seafood is stronger than for omega-3 supplements for some conditions, though people who eat seafood also tend to have healthier lifestyles.
Can berberine lower triglycerides?
A 2025 meta-analysis of placebo-controlled trials in metabolic syndrome found lower triglycerides with berberine, but the authors asked for better trials, and it can interact with medicines. Talk to a clinician first.
Can I stop my medicine if my numbers improve?
No. Do not stop or change a prescribed medicine on your own. Your prescriber will decide after reviewing repeat tests.
When should I see a doctor?
See a doctor for a result of 500 mg/dL or more, severe belly pain, or if you also have diabetes, thyroid, liver or kidney problems. Chest pain, breathlessness, fainting or stroke signs are emergencies.
References
- MedlinePlus. Triglycerides (health topic). Read 2026-10-31. source
- MedlinePlus. Triglycerides Test (lab tests). Read 2026-10-31. source
- CDC. About Cholesterol. Read 2026-10-31. source
- Smart NA, et al. The Effect of Exercise Training on Blood Lipids: A Systematic Review and Meta-analysis. Sports Med. 2025. PMID 39331324. source
- Chiavaroli L, et al. Effect of Fructose on Established Lipid Targets: A Systematic Review and Meta-Analysis of Controlled Feeding Trials. J Am Heart Assoc. 2015. PMID 26358358. source
- Brien SE, et al. Effect of alcohol consumption on biological markers associated with risk of coronary heart disease: systematic review and meta-analysis of interventional studies. BMJ. 2011. PMID 21343206. source
- NHLBI. Blood Cholesterol: Causes and Risk Factors. Read 2026-10-31. source
- NCCIH. Omega-3 Supplements: What You Need To Know. Read 2026-10-31. source
- Semnani-Azad Z, et al. Intermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trials. BMJ. 2025. PMID 40533200. source
- Liu D, et al. Efficacy and safety of berberine on the components of metabolic syndrome: a systematic review and meta-analysis of randomized placebo-controlled trials. Front Pharmacol. 2025. PMID 40740996. source
- Skulas-Ray AC, et al. Omega-3 Fatty Acids for the Management of Hypertriglyceridemia: A Science Advisory From the American Heart Association. Circulation. 2019. PMID 31422671. source
- Gencer B, et al. Effect of Long-Term Marine Omega-3 Fatty Acids Supplementation on the Risk of Atrial Fibrillation in Randomized Controlled Trials of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis. Circulation. 2021. PMID 34612056. source
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Build Heart-Healthy Habits → Support Healthy Blood Pressure → Improve Your Cholesterol Levels → Improve Your Cardiovascular Fitness → Sit Less & Move More → Eat for Heart Health → Support Healthy Blood Sugar → Lose Weight Sustainably →
Ingredients, foods and supplements
Fish oil → Omega fatty acids explained → Berberine → Cod liver oil →
Research, safety and claim-check resources
Medicine interactions → Medicines and weight changes → Eating patterns compared → Fiber, fluids and meal patterns → Improve Your Metabolic Health → Yoga → Tai chi →