Berberine: Evidence for Blood Sugar, Cholesterol and Weight - What Trials Found
What reviews of berberine trials found for blood sugar, cholesterol and weight, how big the effects were, and why lab numbers and trial quality limit the conclusions.
Content last updated . This page has not been medically reviewed.
Quick answer
Reviews of randomized trials found that berberine lowered blood sugar and LDL cholesterol on average, and results for body weight were mixed. All of these are lab or body measurements, not heart attacks, strokes or diabetes complications, and the reviews repeatedly ask for better-quality trials. [1] This page describes research. It is not advice to use berberine, and diabetes and high cholesterol need a clinician. Never replace or stop a prescribed diabetes or cholesterol medicine because of a supplement.
How to read the table
Evidence labels: "promising but limited" (several trials agree, but size or quality is a problem), "mixed" (reviews disagree), "insufficient evidence" (nothing usable found). Study amounts and products differed between trials and are not recommendations. Most trials here were short, between weeks and months, and a change in HbA1c or LDL is a biomarker, not proof of fewer complications.Blood sugar
| Question | What the source found | Label |
|---|---|---|
| Fasting glucose and HbA1c in type 2 diabetes | 37 studies (3,048 people): fasting glucose lower by about 0.82 mmol/L and HbA1c by about 0.63 percentage points; the effect was related to starting levels. [2] | Promising but limited |
| Same question, another review | 46 trials: HbA1c lower by about 0.73 when berberine was used alone or with usual diabetes care. [3] | Promising but limited |
| Berberine versus diabetes medicines | A 27-trial meta-analysis found no statistically significant difference between berberine and oral diabetes drugs. [4] This does not show they are equivalent: see berberine vs metformin. | Insufficient evidence |
| Long-term outcomes (complications, deaths) | Not reported in the reviews we read. | Insufficient evidence |
In the larger glucose review, hypoglycemia (low blood sugar) was not significantly more common, but some people were also taking other diabetes drugs. [2] That is why anyone on diabetes medicine should tell their clinician before adding berberine. More: prediabetes, type 2 diabetes and metabolic syndrome.
Cholesterol
| Question | What the source found | Label |
|---|---|---|
| LDL cholesterol versus placebo | 18 placebo-controlled trials, 4 to 24 weeks: LDL lower by about 0.46 mmol/L; gastrointestinal side effects tended to be more frequent with berberine, and no serious events were reported. [5] | Promising but limited |
| Compared with other supplements | A network meta-analysis of 131 trials ranked bergamot and red yeast rice as the most effective for LDL and total cholesterol. [6] | Mixed |
| Heart-disease patients | 44 trials in 4,606 people; the authors said results may be limited by the quality of existing research. [7] | Promising but limited |
| Combination products | A meta-analysis found the biggest effect for berberine combined with silymarin; effects of combinations must not be assumed for berberine alone. [8] | Mixed |
Weight
| Question | What the source found | Label |
|---|---|---|
| Body weight | One review of 12 studies found about 2.07 kg lower weight on average. [9] A 2026 review of 23 articles found about 0.88 kg lower. [10] | Mixed |
| Berberine or barberry | A review of 12 trials found no significant change in BMI. [11] A dose-response review found no significant decline in body weight. [12] | Mixed |
The 2026 review noted that trials need better reporting of purity, potency and amounts. [10] Averages of about one to two kilograms are small and do not tell us who would benefit. For wider context see weight-loss supplements and fat burners: claim check.
Why the evidence is limited
- The umbrella review of 11 meta-analyses flagged weak methodological quality. [1]
- Trial products differ (plain berberine, combinations, different salts), so one result should not be applied to another product.
- Short trials cannot show long-term safety. See side effects and interactions.
- Back to the overview: berberine.
Frequently asked questions
Does berberine lower HbA1c?
On average, yes in reviews of trials in type 2 diabetes: about 0.63 to 0.73 lower. [2] [3] Whether that prevents complications was not shown in these reviews.
Does berberine lower cholesterol?
Placebo-controlled trials found lower LDL on average. [5] Other supplements ranked higher in a network meta-analysis. [6]
Does berberine help with weight loss?
Results are mixed: some reviews found small average losses and others found no significant change. [9] [11]
Can I use berberine instead of my diabetes or cholesterol medicine?
No. The reviews did not show equivalence, and stopping a prescribed medicine should only happen with your prescriber.
Why do reviews disagree?
They include different trials, products and durations, and reviewers flagged quality problems. [1]
References
- Berberine and health outcomes: An umbrella review. Phytotherapy research : PTR, 2023. Read 2026-10-23.
- Glucose-lowering effect of berberine on type 2 diabetes: A systematic review and meta-analysis. Frontiers in pharmacology, 2022. Read 2026-10-23.
- The Effect of Berberine on Metabolic Profiles in Type 2 Diabetic Patients: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Oxidative medicine and cellular longevity, 2021. Read 2026-10-23.
- Meta-analysis of the effect and safety of berberine in the treatment of type 2 diabetes mellitus, hyperlipemia and hypertension. Journal of ethnopharmacology, 2015. Read 2026-10-23.
- Overall and Sex-Specific Effect of Berberine for the Treatment of Dyslipidemia in Adults: A Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Trials. Drugs, 2023. Read 2026-10-23.
- A network meta-analysis on the comparative effect of nutraceuticals on lipid profile in adults. Pharmacological research, 2022. Read 2026-10-23.
- Efficacy and safety of berberine for several cardiovascular diseases: A systematic review and meta-analysis of randomized controlled trials. Phytomedicine : international journal of phytotherapy and phytopharmacology, 2023. Read 2026-10-23.
- Berberine and Dyslipidemia: Different Applications and Biopharmaceutical Formulations Without Statin-Like Molecules-A Meta-Analysis. Journal of medicinal food, 2020. Read 2026-10-23.
- The effect of berberine supplementation on obesity parameters, inflammation and liver function enzymes: A systematic review and meta-analysis of randomized controlled trials. Clinical nutrition ESPEN, 2020. Read 2026-10-23.
- The effect of berberine on obesity indices: a systematic review and meta-analysis. International journal of obesity (2005), 2026. Read 2026-10-23.
- Effects of berberine and barberry on anthropometric measures: A systematic review and meta-analysis of randomized controlled trials. Complementary therapies in medicine, 2020. Read 2026-10-23.
- The effect of berberine supplementation on obesity indices: A dose- response meta-analysis and systematic review of randomized controlled trials. Complementary therapies in clinical practice, 2020. Read 2026-10-23.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.