What it means
Berberine comes from plants such as goldenseal and barberry. It has been studied for blood sugar and cholesterol, and some reviews find small reductions in weight and BMI, mainly at doses above 1 gram a day for more than 8 weeks.
The NIH's National Center for Complementary and Integrative Health says the evidence is not conclusive. Many studies had a high risk of bias, used different products and doses, and were done mostly in people with diabetes or fatty liver disease.
The "nature's Ozempic" nickname is marketing. Berberine is not a GLP-1 receptor agonist, and no trial has shown weight loss close to that of approved GLP-1 medicines.
Common side effects are nausea, stomach pain, bloating, constipation and diarrhea. It can interact with some medicines. It may be unsafe in pregnancy and breastfeeding and is likely unsafe for infants.
Why it matters
Berberine is often sold as a GLP-1 substitute, so it helps to know how small and uncertain its effect is.
Related terms
Sources
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