Best for Metabolism
Best Inositol for Metabolism
Top 9 products ranked · Reviewed May 2026 · 2000–4000 mg clinical dose
Why Inositol for Metabolism
Inositol plays a important role in metabolism. The predominant naturally occurring isomer of inositol. Studied for PCOS, insulin sensitivity, mood, and anxiety.
What dose to look for
Clinical studies typically use 2000–4000 mg of inositol. Myo-inositol supplement range; higher doses used for mood, hormonal, and metabolic support. Products below this range may not deliver meaningful results.
What the research says
Inositol has moderate clinical evidence for metabolism benefits. Several clinical trials for PCOS and insulin sensitivity, but limited to specific populations Learn more
Clinical research on Myo-Inositol
MODERATE — Reasonably consistent RCTs in PCOS; low-confidence for fertility/GDM · 2–4 g/day (PCOS/metabolic), often with ~400 mcg folic acid
- •2024 guideline meta-analysis (30 trials, 19 pooled, n=2,230): myo-inositol improved some metabolic markers and signaled toward ovulation in PCOS — but the authors called the overall evidence 'limited and inconclusive,' and metformin beat it on waist-hip ratio and hirsutism. PubMed
- •2008 RCT in overweight PCOS women: 2 g/day myo-inositol significantly lowered insulin, HOMA-IR, LH, and the LH:FSH ratio vs folic-acid placebo over 12 weeks. Mechanistically clean but tiny (n=20). PubMed
- •2012 RCT in postmenopausal metabolic syndrome: 4 g/day for 12 months improved blood pressure, HOMA-IR, and lipids vs diet plus placebo. A relatively long trial in a non-PCOS insulin-resistant population (n=80). PubMed
- •2018 Cochrane review (13 trials, n=1,472): uncertain whether myo-inositol improves live birth or clinical pregnancy in PCOS — evidence rated low-to-very-low quality. The honest counterweight to fertility hype.
- •2023 Cochrane review on gestational-diabetes prevention: antenatal myo-inositol MAY reduce GDM, but there is not enough quality evidence to be confident, and most trials come from a few overlapping research groups. No good evidence for weight loss or mood in healthy people.