Big effect
A supplement blend with acetyl-carnitine shrank waist circumference in PCOS — the effect size was unusually large (η² = 0.314), but only when combined with metformin, and this is the first indexed trial of the pairing.
Because this is among the first studies to test this specific supplement–drug combo, the striking reduction in abdominal fat is promising but far from proven — especially since the benefit may depend on the metformin co-treatment and the PCOS population.
In a six-month randomized trial, women with PCOS who took a nutraceutical mix (acetyl-L-carnitine, L-arginine, CoQ10) alongside metformin saw a statistically large drop in waist circumference — a measure of abdominal fat linked to metabolic health. The effect was bigger than with either treatment alone, but the study didn't specify doses, and the results may not apply to people without PCOS or to those taking the supplements without metformin.
Where this fits in the evidence
This is among the first studies we've indexed on Acetyl-Carnitine for Reduced Waist Circumference — treat it as an early signal until more research accumulates.
The study
- Randomized Controlled Trial (RCT)
- 2025-09-30
- Naunyn-Schmiedeberg's archives of pharmacology
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.