Big effect
Barberry supplementation linked to a nearly 10 mmHg drop in systolic blood pressure in a meta-analysis of 718 people — but the wide confidence interval suggests the true effect could be much smaller.
This is the first meta-analysis on barberry and blood pressure, and the effect size is unusually large for a dietary supplement, but the wide confidence interval and lack of specified dose mean the finding needs replication before you should act on it.
A meta-analysis of 718 people found that taking barberry supplements was associated with an average reduction of about 10 mmHg in systolic blood pressure (the top number). However, the results varied widely across studies, and the exact dose used wasn't reported, so the real-world effect could range from a modest 2 mmHg drop to a dramatic 17 mmHg drop — more precise studies are needed to know where the truth lies.
Where this fits in the evidence
This is among the first studies we've indexed on Barberry for Reduced Systolic Blood Pressure — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- n = 718
- 2025-08-30
- Journal of health, population, and nutrition
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.