Berberine
What’s New This Month
- Heart rhythm: Published case reports describe at least five people who developed a dangerous heart rhythm (torsades de pointes) while taking berberine, most with other medicines or supplements; all recovered after stopping. Case reports cannot prove cause. 1 2 3
- Europe: EU food-safety experts are still assessing berberine; a draft could not conclude it is safe, and a final opinion is due by February 2027. EU authorities also flagged berberine supplements in 2025, including one judged unsafe for its daily dose. 4 5 6
- Singapore: Singapore lists goldenseal, barberry, Oregon grape and Chinese goldthread as prohibited ingredients in health supplements (October 2025 guideline). 7
- FDA: FDA warned a seller in 2026 that its berberine products’ disease claims made them unapproved drugs. 8
Overview
Berberine is a bitter, yellow compound found in barberry, Coptis, goldenseal and tree turmeric. It is sold as capsules of plain berberine HCl or newer forms said to absorb better. 9
In Asia, berberine-rich plants have been used for more than 3,000 years, and Coptis is a common herb in traditional Chinese medicine. 9
Labels claim it controls blood sugar, lowers cholesterol, aids weight loss like a “natural GLP-1,” and supports heart and gut health.
How We Researched It
We rate each marketing claim with a modified version of GRADE, the system medical researchers use to say how sure we can be (i.e., high, moderate, low or very low), and check each trial with the Cochrane risk-of-bias tool, which asks whether a study’s design could skew its results. For berberine we screened about 380 records and used 48 evidence rows, published through September 2026. We also checked 10 regulators and safety databases. We found no Cochrane berberine review.
Research NotesTop three benefits
Blood sugar in type 2 diabetes and prediabetes GRADE: Moderate
Against placebo, HbA1c (a 3-month blood sugar average) fell about 0.4 points and fasting sugar about 9 mg/dL. 28 The largest trial, 409 people, agreed. 29
Bias check: Almost all trials were small, short and in China. Berberine alone, without diabetes drugs, showed a weaker effect. 30
LDL cholesterol GRADE: Moderate
In 12 placebo trials (1,224 people), LDL fell about 17 mg/dL. 31 In 337 adults without diabetes it fell only 7.7 mg/dL. 12
Bias check: People in most trials had high cholesterol to start. No trial measured heart attacks or strokes.
Triglycerides GRADE: Moderate
Triglycerides fell about 28 mg/dL in placebo trials. 31 A second pooled analysis found a similar drop. 32
Bias check: Results varied widely between trials, and most lasted 3 months or less.
Benefit Evaluation
| Claim | Claim Verdict | Research Confidence | Supporting Evidence | Safety Risk | Product Quality | FactStack™ Rating |
|---|---|---|---|---|---|---|
| Blood sugar in type 2 diabetes and prediabetes | Supported | Moderate | Convincing | Caution | Inconsistent | Caution |
| LDL cholesterol | Supported | Moderate | Convincing | Caution | Inconsistent | Caution |
| Triglycerides | Supported | Moderate | Convincing | Caution | Inconsistent | Caution |
| apoB | Promising | Low | Promising | Caution | Inconsistent | Caution |
| Adenoma Recurrence | Promising | Low | Promising | Caution | Inconsistent | Caution |
| Normal-Range Blood Sugar | TBD | Low | TBD | Caution | Inconsistent | Warning |
| Equal to Metformin | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| GLP-1 Effect | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| Heart Health | TBD | Low | TBD | Caution | Inconsistent | Warning |
| Gut Health | TBD | Low | TBD | Caution | Inconsistent | Warning |
| PCOS Add-On Treatment | TBD | Low | TBD | Caution | Inconsistent | Warning |
| PCOS Insulin Resistance | TBD | Low | TBD | Caution | Inconsistent | Warning |
| Cancer | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| Depression and Infection | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| Energy, Immunity, Aging and Cognition | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| Hormone Balance, Skin, Ketones and Mitochondria | TBD | Very Low | TBD | Caution | Inconsistent | Warning |
| Blood Pressure | Doubtful | Low | Doubtful | Caution | Inconsistent | Warning |
| HDL Cholesterol | Unsupported | Moderate | Unconvincing | Caution | Inconsistent | Warning |
| Weight and Body Fat | Unsupported | Moderate | Unconvincing | Caution | Inconsistent | Warning |
| Fatty Liver | Unsupported | Moderate | Unconvincing | Caution | Inconsistent | Warning |
| PCOS Fertility | Unsupported | Moderate | Unconvincing | Caution | Inconsistent | Warning |
What Sellers Say vs. What Studies Show
| “Berberine is nature’s Ozempic.” | No human study has measured a GLP-1 effect. Pooled weight loss was under 1 kg (about 2 lb). 10 |
| “It works as well as metformin.” | The only direct test was one unblinded 3-month trial in 36 people. That cannot show the two are equal. 11 |
| “It keeps normal blood sugar normal.” | In 337 adults without diabetes, fasting sugar and HbA1c did not change over 6 months. 12 |
| “It melts belly fat.” | The best trial, 337 adults for 6 months, found no change in belly fat, liver fat or weight. 12 |
| “Dihydroberberine works 5 times better.” | It raised blood levels in 5 men after one dose, but blood sugar and insulin were no different. 13 |
| “It has an outstanding safety record.” | Stomach upset hit up to a third of users in some trials, and berberine raises the levels of many drugs. 11 14 |
Trial ParametersIf you try it
| Who | Adults with type 2 diabetes, prediabetes or raised LDL, on no interacting drugs, with their clinician’s OK. Trials were mostly small and in China. |
| Dose | No authority dose. Trials used 0.9 to 1.5 g a day, split with meals. |
| Ceiling | None established. A draft by EU experts could not conclude it is safe; a final opinion is due by February 2027. 4 |
| Duration | Re-test HbA1c (a 3-month blood sugar average) or LDL at 3 months; stop if unchanged. Stop at once for fainting or palpitations. |
| Form | An NSF- or ConsumerLab-checked product. Avoid goldenseal as a source; all three tested failed. Dihydroberberine shows no better results. 15 |
| Ask First | Cyclosporine, tacrolimus, diabetes drugs, statins, warfarin, CYP3A4, 2D6 or 2C9 drugs, QT-prolonging drugs; heart-rhythm problems; low potassium or magnesium; liver disease; pregnancy, breastfeeding, children. |
How to Take It
| Pick a plan | Trials used 0.9 to 1.5 g a day, split into smaller doses. Ask your clinician first. |
| Time of day | Not reported. |
| With food | Take it with meals, as in trials. |
| What to expect | Re-test HbA1c or LDL at 3 months and stop if nothing moved. Stomach upset or constipation is common early on. Stop at once for fainting or palpitations. |
| How to take | Choose a product with an NSF or ConsumerLab contents check. Avoid goldenseal sold as a berberine source. 15 |
Works With / Don’t Mix With
✓ Works with
Not reported. We found no supplement or food shown to add to berberine’s effect. Approved drugs such as metformin and statins have outcome trials; berberine does not.
⚠ Ask first / don’t mix
Cyclosporine or tacrolimus (anti-rejection drugs). Berberine raised cyclosporine levels about 29%. 16
Diabetes drugs (insulin, sulfonylureas, metformin). Blood sugar could drop too low. 17
Drugs cleared by liver enzymes CYP3A4, 2D6 or 2C9, or drugs that affect heart rhythm. Berberine raises the levels of many medicines. 14 17
Manufacturer Recalls & WarningsLast 36 months, newest first
| Date | Maker / Brand | Product | Action | Src |
|---|---|---|---|---|
| Jun 2026 | Nutriflair; Decent Nature (sold at Walmart and Amazon) | Berberine-cinnamon-chromium products; Organic Berberine Cinnamon | Six California Prop 65 notices, Aug 2025 to Jun 2026, allege lead. Notices are allegations, not findings. | 19 20 |
| Jan 2026 | Supersmart USA | Berberine; Berberine Max Bioactivity | FDA warning letter: the products’ disease claims made them unapproved new drugs. | 8 |
Where to Buy
We compare products side-by-side not just on price, but on whether NSF lists the product as NSF/ANSI 173 Contents Certified (an independent lab confirms the label matches the contents), whether it is NSF Certified for Sport, whether USP lists it as USP Verified, and whether the seller says it is manufactured in the USA. We leave out a brand’s products for this supplement when, in the last 36 months, the FDA took action against that brand over this supplement (a Class I or II recall, a warning letter, an import alert or an advisory letter). We also leave out any brand with an FDA Class II recall or warning letter on any product. We also leave out any product named in a California Prop 65 notice or a non-US recall, along with that brand’s products of the same ingredient and form. Brands with other actions stay listed and are marked in the Recall Screen column. Our goal remains to provide you, the Consumer, with the information and data necessary to make an informed purchasing decision. Prices reflected below are static and subject to change.
Ratings above describe the ingredient’s research, not any product listed below.
| # | Retailer | Product | Price | NSF 173 | NSF Sport | USP | Mfg. in USA (per seller) | Recall Screen | Affiliate link |
|---|---|---|---|---|---|---|---|---|---|
| 1 | iHerb | Toniiq, Berberine, 90 Capsules (500 mg per Capsule) | $29.97 | ✓ | ✓ | ✓ | View on iHerb ↗ | ||
| 2 | iHerb | Thorne, Berberine, 200 mg, 60 Capsules | $30.00 | ✓ | ✓ | ✓* | View on iHerb ↗ | ||
| 3 | Amazon | Momentous Berberine, Bioavailable Formula, 550 mg per serving | Check Price | ✓ | ✓ | ✓ | View on Amazon ↗ | ||
| 4 | Amazon | Theralogix Berberine Enhanced Absorption | Check Price | ✓ | ✓ | ✓ | View on Amazon ↗ | ||
| 5 | HerbsPro | Source Naturals, Dihydroberberine, 200 Mg, 30 Veg Caps | $16.79 | ✓ | ✓ | View on HerbsPro ↗ | |||
| 6 | HerbsPro | 21st Century, Berberine HCI, 1000 Mg, 60 Veg Caps | $22.28 | ✓ | ✓ | View on HerbsPro ↗ | |||
| 7 | HerbsPro | Now Foods, Berberine HCl, 500 Mg, 90 Veg Capsules | $23.73 | ✓ | ✓* | View on HerbsPro ↗ | |||
| 8 | Green's Nutrition | Nutricost Berberine HCl 60 Caps | $27.95 | ✓ | ✓* | View on Green's Nutrition ↗ | |||
| 9 | Green's Nutrition | Solaray Berberine Phytosome 30 Veg Caps | $28.79 | ✓ | ✓* | View on Green's Nutrition ↗ | |||
| 10 | Green's Nutrition | Pure Encapsulations Berberine Ultrasorb 60 Caps | $51.50 | ✓ | ✓* | View on Green's Nutrition ↗ |
Sources
1. Mesmin et al. Torsades de pointes in a 92-year-old taking berberine (case report). Clinical Practice and Cases in Emergency Medicine, 1 Aug 2026. pmc.ncbi.nlm.nih.gov/articles/PMC13517994/
2. Williams, Yadlapalli and Franchi. Torsades de pointes and cardiac arrest with berberine use (case report; corrected 3 Sep 2026). Cureus, 2026. doi.org/10.7759/cureus.111276
3. Mohammadi et al. Recurrent torsades de pointes precipitated by berberine supplement (case report). JACC: Case Reports, 2 Sep 2026. doi.org/10.1016/j.jaccas.2026.110193
4. EFSA-Q-2022-00803, safety of plant preparations containing berberine: “Ongoing Risk Assessment”, deadline 28 February 2027. European Food Safety Authority (OpenEFSA), updated 10 Jul 2026. open.efsa.europa.eu/questions/EFSA-Q-2022-00803
5. RASFF 2025.1757: too high content of berberine, piperine and unapproved health claims in food supplement (“Not safe”). European Commission, RASFF Window, 11 Mar 2025. webgate.ec.europa.eu/rasff-window/screen/notification/744471
6. RASFF 2025.4545: unauthorised novel food ingredient berberine HCl in food supplement from Germany, produced in Bulgaria. European Commission, RASFF Window, 17 Jun 2025. webgate.ec.europa.eu/rasff-window/screen/notification/770427
7. Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines (GL-CHPB-1-012 Rev. 001), item 53. Health Sciences Authority, Singapore, Oct 2025. file.go.gov.sg/hsa-chp-prohibited-restricted-ing-guidelines.pdf
8. Warning letter to Supersmart USA, LLC (CMS 706566). US Food and Drug Administration, 21 Jan 2026. www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/supersmart-usa-llc-706566-01212026
9. Neag MA et al. Berberine: botanical occurrence, traditional uses, extraction methods, and relevance in cardiovascular, metabolic, hepatic, and renal disorders. Frontiers in Pharmacology 9:557, 2018. doi.org/10.3389/fphar.2018.00557
10. Meta-analysis of berberine and body weight (23 trials). International Journal of Obesity, 2025. doi.org/10.1038/s41366-025-01943-x
11. Yin J et al. Berberine vs metformin in type 2 diabetes (36 people, 3 months). Metabolism, 2008. pubmed.ncbi.nlm.nih.gov/18442638/
12. Lei et al. Berberine in 337 adults with obesity and fatty liver, 6 months. JAMA Network Open, 2026. doi.org/10.1001/jamanetworkopen.2025.54152
13. Moon JM et al. Dihydroberberine vs berberine blood levels in 5 men (single dose). Nutrients, 2022. doi.org/10.3390/nu14010124
14. Guo Y et al. Berberine and drug-metabolizing (CYP) enzymes in healthy men. European Journal of Clinical Pharmacology, 2012. doi.org/10.1007/s00228-011-1108-2
15. Berberine and Goldenseal Supplements Review. ConsumerLab.com, updated 8 Sep 2026. www.consumerlab.com/
16. Wu X et al. Berberine raises cyclosporine levels in kidney-transplant patients. PubMed record, 2005. pubmed.ncbi.nlm.nih.gov/16133554/
17. Dumitru et al. Berberine-drug interactions: mechanisms, clinical relevance and risk stratification (narrative review). Pharmaceuticals 19(8):1313, 2026. www.mdpi.com/1424-8247/19/8/1313
18. Berberine and Weight Loss. National Center for Complementary and Integrative Health (NIH), Nov 2023. www.nccih.nih.gov/health/berberine-and-weight-loss
19. Proposition 65 60-day notice 2026-03100, Decent Nature Organic Berberine Cinnamon (lead). California Office of the Attorney General, 26 Jun 2026. oag.ca.gov/prop65/60-Day-Notice-2026-03100
20. Proposition 65 60-day notices for lead: Nutriflair and Decent Nature berberine-cinnamon products (six notices). California Office of the Attorney General, Aug 2025 to Jun 2026. oag.ca.gov/prop65
21. openFDA food enforcement reports, search “berberine” (no recall since Oct 2024). US Food and Drug Administration, 3 Oct 2026. api.fda.gov/food/enforcement.json?search=product_description:berberine
22. Recalls and safety alerts, search “berberine” and “dihydroberberine” (archive included): no results. Health Canada, 3 Oct 2026. recalls-rappels.canada.ca/en
23. CAERS adverse event reports including 2024-CFS-010814 (QT prolonged), 2025-CFS-015064 (slow heart rate) and 2025-CFS-006955 (goldenseal, jaundice). US Food and Drug Administration (openFDA food adverse events), Aug 2024 to Sep 2025. api.fda.gov/food/event.json?search=report_number:%222024-CFS-010814%22+report_number:%222025-CFS-006955%22+report_number:%222025-CFS-015064%22&limit=3
24. Licensed Natural Health Products Database: berberine licence NPN 80093363. Health Canada, revised 24 May 2024. health-products.canada.ca/lnhpd-bdpsnh/
25. Therapeutic Goods (Permissible Ingredients) Determination (No. 2) 2026, entry 828 Berberis aristata. Australian Government, Federal Register of Legislation, compilation 17 Sep 2026. www.legislation.gov.au/F2026L00707/latest/text
26. NSF/ANSI 173 certified dietary supplements: berberine (16 products, 9 companies). NSF International, 3 Oct 2026. info.nsf.org/Certified/Dietary/
27. Funk et al. Berberine content of US dietary supplements. Journal of Dietary Supplements, 2018. pmc.ncbi.nlm.nih.gov/articles/PMC5807210/
28. Zhao et al. Meta-analysis of placebo-controlled berberine trials on blood sugar. Journal of Nutrition, 2023. doi.org/10.1016/j.tjnut.2023.08.016
29. Zhang Y et al. PREMOTE: berberine and probiotics in 409 people with new type 2 diabetes. Nature Communications, 2020. doi.org/10.1038/s41467-020-18414-8
30. Wang et al. Meta-analysis of berberine in type 2 diabetes (50 trials). Frontiers in Pharmacology, 2024. doi.org/10.3389/fphar.2024.1455534
31. Blais JE et al. Meta-analysis of placebo-controlled berberine trials on blood lipids. Drugs, 2023. doi.org/10.1007/s40265-023-01841-4
32. Liu et al. Meta-analysis of 12 placebo-controlled berberine trials (889 people). Frontiers in Pharmacology, 2025. doi.org/10.3389/fphar.2025.1572197
