Diets · Metabolic & Cardiometabolic
ketogenic diet improves PCOS
Part of: 🥗 ketogenic diet
📅 Last reviewed: 2026-07-15 ⓘ
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
What the evidence shows
Ketogenic diets improve PCOS metabolic and reproductive markers (lower androgens, higher SHBG, improved HOMA-IR, menstrual regularity) - promising but low-to-moderate certainty, short trials, effects entangled with weight loss. Directly relevant to the family's PCOS profile.
The evidence (8)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Maseroli E, Alfaroli C, Cirillo M, Ravelli SA, Lambrinoudaki I, Focardi M, Virgili G, Vignozzi L 2026 · (MA) | meta-analysis | supports | moderate | MA: KD reduced biochemical hyperandrogenism, raised SHBG in overweight PCOS |
| Seven Avuk H, Baş M 2025 · Nutricion hospitalaria | observational | mixed | low | n=13, 4wk LCKD: glucose/insulin/HOMA-IR down (p<0.05), SHBG UP (p<0.05) but TNF-alpha also UP (p<0.05) |
| Turetta C, Turetta C, Giannini A, Tarsitano MG, Gianfrilli D, Paoli A, Kontopantelis E, De Angelis E, Minnetti M, Poggiogalle E, Colizza A, De Vincentiis M, Laganà AS, Bogani G, Palaia I, Muzii L, Di Donato V 2025 · (SR/MA) | meta-analysis | supports | moderate | SR/MA: favorable metabolic/endocrine PCOS outcomes (low-moderate certainty) |
| Fleigle D, Brumitt J, McCarthy E, Adelman T, Asbell C 2025 · Nutrients | observational | supports | low | scoping review, 8 studies: improved androgens, HOMA-IR, glucose/insulin, LH/FSH, SHBG, menstruation, fertility |
| Arsenaki E, Stathi D, Triantafyllidis KK, Seldon Y, Bobotis S, Lockett G, Haran S, Kyrgiou M, Saso S, Kechagias KS 2026 · Clin Nutr | meta-analysis | supports | moderate | SR/MA: improved weight, HOMA-IR, LH/FSH, menstrual regularity & ovulation |
| Lima M, Fabe J, Grigolon RB, Ceolin G, Palma N, Gerchman F, Brietzke E, Gomes FA 2026 · Nutrition reviews | meta-analysis | supports | moderate | SR of 7 studies (3 female-only): KD lowered testosterone, improved LH/FSH ratio, insulin sensitivity, menstrual regularity in PCOS |
| Paskaleva IN, Kaleva NN, Dimcheva TD, Ivanov IS 2026 · Children (Basel, Switzerland) | observational | supports | low | PCOS subgroup n=8/58: insulin p<0.0001, testosterone down, all resumed spontaneous menses; whole-cohort adiponectin p=0.04 |
| Akbaş E et al 2026 · European journal of nutrition | meta-analysis | mixed | moderate | SR of 38 diet studies incl. keto: most diets improved insulin sensitivity/hormones/menses but lipid/inflammatory findings inconsistent |
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