What is berberine?
Berberine is a yellow compound from plants such as goldenseal and barberry that modestly lowers blood sugar, partly by switching on the cell's fuel gauge, AMPK.
If your cells have a low-fuel warning light (AMPK), berberine nudges that light on, so cells burn a bit more fuel and the liver releases a bit less sugar into the blood.
Why it matters for aging
Berberine has been used for centuries in traditional Chinese and Ayurvedic medicine. Modern trials in people with type 2 diabetes show it lowers average blood sugar modestly, by around 0.6 percentage points of HbA1c in one meta-analysis.
Common side effects are stomach cramps, diarrhea and constipation. It also affects liver enzymes that process many medications, so check with a doctor or pharmacist before taking it, especially with diabetes drugs.
A common myth
Berberine is nature's Ozempic.
In pooled trials it lowered body weight by only about 1 to 2 kg. Semaglutide, the drug in Ozempic, produced about 15 percent average weight loss in its main trial. Berberine's blood sugar effect is real; its weight effect is small.
Go deeper
Deep dives
- Berberine vs metformin: what the evidence actually says
- Early signs of insulin resistance, and what comes before them
Related terms
Updated Nov 9, 2026 · All terms