Best Berberine (2026): Dose, Form & Safety Notes
The best berberine for most people is NutriFlair Berberine + Ceylon Cinnamon: two capsules give 1,200 mg, in the range many trials used, for $0.47 a day. Trials found berberine lowered blood sugar and LDL cholesterol a little, mostly in people with diabetes or high cholesterol. It interacts with real medicines, so check with your doctor.
By Erin Rose Updated October 19, 2026 How we score
Our pick for: Most people
- Berberine a day
- 1,200 mg2 capsules, in the range many trials used
- Form
- Berberine HClPlus 100 mg Ceylon cinnamon
- Testing
- Not listedLike most berberine
- Cost
- $0.47 a dayBrand price; Amazon’s can differ
Why we pick it Two capsules give 1,200 mg, in the 1,000 to 1,500 mg a day many trials used, and it costs the least per 1,000 mg of the berberine we compared.
What you give up It is on no public testing list. Want one that is? See Toniiq below.
Which berberine is right for you?
Here are two other good choices.
Want one on a testing list?
NSF/ANSI 173, which checks that a product matches its label, lists Toniiq Berberine. Each capsule holds 500 mg, so 2 or 3 capsules a day give 1,000 or 1,500 mg, for $0.67 a day at 2 capsules. Thorne is also on the list but costs about twice as much as Toniiq ($1.47 a day).
Toniiq Berberine 500 mg
7.5/10 · $0.67 a day · NSF/ANSI 173
Want plain berberine, no cinnamon?
Nutricost gives 1,200 mg of berberine HCl in two capsules and nothing else, for $0.70 a day at its own price. It is on no public testing list.
Nutricost Berberine 1200
7.5/10 · $0.70 a day
Taking diabetes medicine or another prescription?
Ask your doctor or pharmacist first: berberine adds to the drop from diabetes drugs and changes how the liver clears many medicines. See side effects and drug cautions.
Berberine supplements we compared
Scored on dose, testing, cost, label and recalls. Our pick comes first. Costs are the capsules that reach 1,000 mg a day at each brand’s own price.
| Berberine | Per day | Why it is or is not a pick |
|---|---|---|
| NutriFlair Berberine + Ceylon Cinnamon8.5/10 | $0.47 | Our pick: 1,200 mg in 2 capsules, the lowest cost per 1,000 mg; no testing list |
| Toniiq Berberine 500 mg7.5/10 | $0.67 | Our tested pick: on NSF/ANSI 173 at less than half Thorne’s cost; 2 or 3 capsules a day |
| Thorne Berberine8.0/10 | $1.47 | On NSF/ANSI 173 (two forms of berberine); about three times our pick’s cost |
| Nutricost Berberine 12007.5/10 | $0.70 | Plain berberine HCl, 1,200 mg in 2 capsules; no testing list |
| Integrative Therapeutics Berberine5.0/10 | $1.09 | 500 mg a capsule, 2 to 3 a day; costs more; no testing list |
| NOW Berberine Glucose Support2.0/10 | $1.33 | 400 mg a softgel, 3 a day; costs more; no testing list |
| Sunergetic Berberine 1200Not scored | No list price | 1,200 mg in 2 capsules; no brand store, so no list price to compare |
| Double Wood DihydroberberineNot scored | $0.38, 1 capsule | Dihydroberberine, a different form taken at 100 to 300 mg; not scored against berberine |
How to read a berberine label
Look for berberine HCl and its milligrams per capsule, then count the capsules that reach 1,000 to 1,500 mg a day. Some products put berberine in a blend, so the big number on the front is not all berberine. Dihydroberberine is a different form, taken at much lower amounts.
Does berberine work?
Trials found berberine lowered fasting blood sugar, long-term blood sugar (HbA1c) and fasting insulin, compared with a placebo pill (Zhao 2023). Trials found it lowered LDL cholesterol and triglycerides, compared with a placebo pill (Blais 2023). Most trials were in adults with type 2 diabetes, high cholesterol, metabolic syndrome, fatty liver or PCOS, mostly in China. We found no trial of berberine alone in healthy adults who only want to lose weight. More in our berberine guide.
Questions people ask
Does berberine help with weight loss?
A little. In a review of 23 trials, people who took berberine lost about 2 pounds (0.88 kg) more than people who did not (Elahi Vahed 2026). See berberine for weight loss.
Is berberine the same as metformin?
They are different things: metformin is a prescription drug for type 2 diabetes, and berberine is a supplement. Both lower blood sugar. A review of 14 trials in people with type 2 diabetes found berberine did not control blood sugar better than diabetes pills such as metformin, and taking the two together lowered blood sugar more than the pill alone (Dong 2012). So do not swap one for the other or mix them on your own: ask your doctor.
Who should not take berberine?
Pregnancy and breastfeeding: NCCIH says pregnant or breastfeeding women should not use goldenseal, which contains berberine, and that its berberine can harm newborns. In lab and rat tests it pushed bilirubin off its carrier protein, which raises concern about newborn jaundice (Chan 1993). Ask your doctor. If you take diabetes medicine or any prescription, ask your doctor or pharmacist first. Upset stomach is the most common side effect (2% to 23% on berberine vs 2% to 15% on a placebo pill; Blais 2023).
How we score
Five marks: does one label serving reach the 1,000 to 1,500 mg a day many trials used (so Toniiq, 500 mg a capsule, loses a point even though 2 or 3 capsules reach it); is the product on a public testing list; what it costs at the brand’s own price against the cheapest; does the label state the amount outside a blend; and the brand’s FDA recall record. Dose and testing are worth up to 3 points each, cost up to 2, label and recalls up to 1 each. More on our method.
Sources
- Zhao, et al. “Overall and Sex-Specific Effect of Berberine on Glycemic and Insulin-Related Traits: a Systematic Review and Meta-Analysis of Randomized Controlled Trials.” J Nutr. 2023. PubMed 37598753
- Blais, et al. “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. PubMed 36941490
- Elahi Vahed, et al. “The effect of berberine on obesity indices: a systematic review and meta-analysis.” Int J Obes. 2026. PubMed 41310257
- Dong, et al. “Berberine in the treatment of type 2 diabetes mellitus: a systemic review and meta-analysis.” Evid Based Complement Alternat Med. 2012. PubMed 23118793
- NCCIH. “Goldenseal.” nccih.nih.gov
- Chan, et al. “Displacement of bilirubin from albumin by berberine.” Biol Neonate. 1993. PubMed 8513024
- Testing lists: NSF/ANSI 173, NSF Certified for Sport, USP Verified, Informed Choice and Informed Sport, searched October 15, 2026. Labels and prices from each brand’s own page.