Diets · Metabolic & Cardiometabolic
ketogenic diet improves insulin resistance and androgen markers in PCOS
In plain terms: Does the ketogenic diet improve PCOS markers like insulin resistance and high testosterone?
Part of: 🥗 ketogenic diet
Yes in the short term — keto lowers weight, fasting insulin/HOMA-IR and free testosterone while raising SHBG in overweight PCOS, but evidence is low-to-moderate certainty and largely weight-loss-mediated.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
The evidence (4)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Diha 2026 · Cureus | meta-analysis | supports | low | Systematic review of 14 studies (643 women): KD improved insulin sensitivity (fasting insulin, HOMA-IR), lowered total/free testosterone, raised SHBG and normalized LH/FSH, at low-to-moderate certainty. |
| Tosatti 2026 · Br J Nutr | meta-analysis | supports | moderate | Meta-analysis of 11-12 clinical trials found very-low-carb ketogenic diet significantly reduced weight and improved metabolic/hormonal outcomes in women with PCOS. |
| Pandurevic 2023 · Endocr Connect | RCT | supports | moderate | 16-week RCT: very-low-calorie ketogenic diet vs Mediterranean low-calorie diet improved metabolic and reproductive parameters in obese PCOS women. |
| Rittig 2025 · Eur J Endocrinol | RCT | mixed | moderate | RCT showing exogenous BHB (ketone) supplementation alone acutely lowered androgens and glucose in PCOS, suggesting ketone bodies mediate part of the effect independent of the full diet. |
Disagree, or know a study we missed?
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.