Fact of the day

Friday, 21 August 2026

Women's Healthwell supported · human dataDiscovery of the day

In a meta-analysis of 15 randomised trials covering 916 women with polycystic ovary syndrome, polyphenol supplements modestly reduced serum insulin, luteinising hormone and BMI compared with placebo, while testosterone levels did not change.

Study design
Meta-analysis
Journal
Eur J Obstet Gynecol Reprod Biol
Evidence
well supported

What it shows: Real but modest: results pooled from 15 trials in 916 women, and the BMI change in particular was tiny. Testosterone, a key driver of PCOS symptoms, did not move, so this is a supporting act rather than a stand-alone treatment.Meta-analysis · Eur J Obstet Gynecol Reprod Biol

Effects of polyphenol in women with polycystic ovary syndrome: A systematic review and meta-analysis of randomized controlled trials. Eur J Obstet Gynecol Reprod Biol 2024Read the study →

Want the bottomless version? Open the full Pulse feed → Or browse every study in the study archive.