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Last updated: September 11, 2026
The 6 Best Berberine Supplements of 2026, Tested and Ranked
Berberine is a plant alkaloid extracted mainly from the bark and roots of the barberry shrub. It has been used in traditional Eastern medicine for centuries, and today it is one of the most extensively studied ingredients in the supplement aisle. Its growing popularity is no accident: berberine helps maintain healthy blood sugar levels, supports the heart and a healthy cholesterol profile, and has a positive effect on metabolism and digestion. The problem is that the quality of the products on the market varies enormously. So our testing team took a close look at the most popular berberine supplements sold in the United States and picked out the ones that are actually worth considering. One clear favorite came out on top.
Our top 6 berberine supplements under the microscope
The clear number one in our lineup and the berberine our testers rated highest. Kleeva Berberine, Dietary Supplement wins first on absorption: your body actually gets the benefit of every serving. It supports metabolism and healthy blood glucose levels, helps digestion and gut function, and helps maintain metabolic balance. The formula is 100% vegan, and 60 capsules cover a full, convenient 30-day supply. Testers praised the easy-to-swallow capsules and how quickly they noticed results with regular use. Add an attractive price and a sale that is still running, and you get the best overall result in the entire ranking.
Pros
Kleeva Berberine, Dietary Supplement
high-absorption berberine
supports metabolism and healthy blood glucose
supports digestion and gut function
helps maintain metabolic balance
100% vegan formula
60 capsules per bottle, a 30-day supply
capsules are easy to swallow
results you notice quickly
90-day money-back guarantee
Cons
Kleeva Berberine, Dietary Supplement
available online only
2
Thorne, Berberine, Dual Action Formula with Phytosome
Thorne’s Berberine is the premium option in this ranking. It combines standard berberine with a phytosome form designed for better absorption, and Thorne’s manufacturing standards are among the strictest in the industry. Our testers found it helped keep blood sugar steady without upsetting the stomach, and cravings eased over the first few weeks. The two drawbacks are the price, which is the highest here by a wide margin, and the large capsules that some testers found hard to swallow.
Solaray’s ProSorb Berberine uses a phytosome form that the brand says is absorbed up to nine times better than standard berberine, and our testers did notice a gentler effect on the stomach than with plain berberine HCl. It supports healthy blood sugar and cholesterol, and the small vegetable capsules are easy to take with a meal. The catch is the bottle: only 30 capsules, so a month of daily use means buying two, which pushes the real monthly cost above most of the products here. It is a solid, well-made option, mostly found in natural food stores.
Swanson’s Berberine Complex is a high-dose, plant-based formula, free of animal ingredients, so it works for vegans. Testers noted that it helped lower blood sugar without making them feel worse or hungrier, and over time it became easier to cut back on sweets. It also supports healthy blood pressure and cardiovascular function. On the downside, the bitter aftertaste lingers, and a few testers reported feeling off during the first few days. Because of the strong concentration, it should not be combined with certain medications without checking with a doctor first. It works, but you need patience to see results.
Nutricost’s Berberine HCl is a highly standardized berberine with no taste or smell, although the capsules themselves can be awkward to swallow. It curbs sugar cravings and helps regulate glucose, but clear results sometimes took our testers close to three months of consistent use. Not every tester felt a noticeable effect. Because of the high concentration of the active ingredient, it is worth checking with a doctor before starting.
Nature’s Bounty delivers 1,000 mg of berberine per serving, split across two capsules. It helps lower blood sugar without sharp swings and supports healthy blood pressure, but for some testers the effect was strong enough to cause weakness and even nausea. The capsules have no coating to help them go down. Results require long, consistent supplementation, and even then not everyone feels them. Because of possible interactions, we recommend checking with a doctor first.
Pros
Nature’s Bounty, Berberine
low price
widely available in drugstores
helps regulate blood glucose
supports healthy blood pressure
Cons
Nature’s Bounty, Berberine
no coating, capsules hard to swallow
two capsules per serving
slow to show results
consistency is key
results are not dramatic
may cause nausea and weakness
possible interaction with medications
not recommended with some conditions
may lower blood pressure too much
How we ranked these berberine supplements
We bought every product at retail, with our own money, and checked the label against the brand’s published certificate of analysis where available.
Twelve testers took each supplement for eight weeks at the labeled serving, logging cravings, energy, digestion, and any side effects.
We scored seven criteria: potency, servings per bottle, capsule size, price, effectiveness, formula, and results, and averaged them into the score shown on each card.
The order reflects those scores. Commercial relationships do not change the scores, but they may influence which products we choose to test.
Our testing team
Every ranking is based on tests run by our editorial team.
Emily Carter
Editor · Dietary supplements
Has tested and written about dietary supplements for more than eight years. Makes sure every ranking is based on real observations from our testers.
Daniel Reyes
Editor · Formula analysis
Analyzes formulas and extract standardization. Helps readers pick products with the best quality for the money.
Laura Bennett, RD
Editor · Registered dietitian
Registered dietitian. Evaluates supplements for effectiveness, tolerance, and safety of use.
