Inositol
Other ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Sugar alcohol involved in insulin signaling and neurotransmitter function.
Exploratory record, not a reviewed medical publication.
See the editorial and medical-review policies for the publication gate.
This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Inositol is an other most often used for pcos support, anxiety reduction, insulin sensitivity. NutriStack rates the overall evidence as strong. A typical adult dose is 2-4 g myo-inositol daily (40:1 ratio with D-chiro for PCOS), commonly taken as myo-inositol powder (most researched for pcos). This profile indexes 21 sources.
The bottom line
Evidence rating strong. Most-documented uses: pcos support, anxiety reduction, insulin sensitivity. 21 sources indexed (1995–2025), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Component of phosphatidylinositol (PI) cell signaling. Myo-inositol is a second messenger for insulin, serotonin, and FSH receptors. D-chiro-inositol supports insulin sensitivity.1,2
Dosing & protocol.
What it actually costs.
Real-world pricing across three quality tiers. Assumes Myo-Inositol Powder.
Assumes 2-4 g/day. Vendor basis: BulkSupplements powder, NOW/iHerb, Vitacost, and Amazon marketplace; 40:1 myo/D-chiro blends price higher. Updated 2026-05-28.
The same dose, as food.
How much you'd eat to match a supplemental dose.
Food inositol content varies and is often bound as phytate.
Full safety detail.
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
15- 1Comparison of metformin with inositol versus metformin alone in women with polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trialsPMIDKelly FA, de Oliveira Macena Lôbo A, Cardoso JHCO et al. · Endocrine · 2025
Kelly FA, de Oliveira Macena Lôbo A, Cardoso JHCO et al.. Comparison of metformin with inositol versus metformin alone in women with polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trials. Endocrine. 2025
- 2Efficacy of inositol supplementation in the prevention and treatment of gestational diabetes mellitus: A meta-analysisPMIDWang RT, Feng YQ, Wang MY et al. · World journal of diabetes · 2025
Wang RT, Feng YQ, Wang MY et al.. Efficacy of inositol supplementation in the prevention and treatment of gestational diabetes mellitus: A meta-analysis. World journal of diabetes. 2025
- 3Inositol for Polycystic Ovary Syndrome: A Systematic Review and Meta-analysis to Inform the 2023 Update of the International Evidence-based PCOS GuidelinesPMIDZarezadeh M et al. · J Clin Endocrinol Metab · 2024
Evidence supporting the use of inositol in PCOS management is limited and inconclusive, though some benefits noted for specific outcomes.
- 4Role of Supplementation with Selenium and Myo-Inositol Versus Selenium Alone in Patients of Autoimmune Thyroiditis: A Systematic Review and Meta-Analysis.PMIDZuhair V, Sheikh AT, Shafi N, Babar A, Khan A, Sadiq A et al. · Clinical Medicine Insights: Endocrinology and Diabetes · 2024
Combined selenium and myo-inositol supplementation was more effective than selenium alone in improving thyroid function and reducing thyroid antibodies in autoimmune thyroiditis patients.
- 5Inositol is an effective and safe treatment in polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trialsPMIDGreff D et al. · Reprod Biol Endocrinol · 2023
Myo-inositol is effective and safe for PCOS; causes fewer GI adverse events than metformin and improves metabolic profile with reduced hyperandrogenism.
- 6Antenatal dietary supplementation with myo-inositol for preventing gestational diabetes.PMIDMotuhifonua SK, Lin L, Alsweiler J, Crawford TJ, Crowther CA · Cochrane Database of Systematic Reviews · 2023
Myo-inositol supplementation during pregnancy may reduce the risk of developing gestational diabetes mellitus, though the certainty of evidence was rated as low to moderate.
- 7The Efficacy and Safety of Myo-inositol Supplementation for the Prevention of Gestational Diabetes Mellitus in Overweight and Obese Pregnant Women: A Systematic Review and Meta-AnalysisPMIDFactor PA, Corpuz H · Journal of the ASEAN Federation of Endocrine Societies · 2023
Factor PA, Corpuz H. The Efficacy and Safety of Myo-inositol Supplementation for the Prevention of Gestational Diabetes Mellitus in Overweight and Obese Pregnant Women: A Systematic Review and Meta-Analysis. Journal of the ASEAN Federation of Endocrine Societies. 2023
- 8Inositol Nutritional Supplementation for the Prevention of Gestational Diabetes Mellitus: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.PMIDWei J, Yan J, Yang H · Nutrients · 2022
Myo-inositol supplementation significantly reduced the incidence of gestational diabetes mellitus and improved insulin sensitivity in pregnant women.
- 9Inositol supplementation and body mass index: A systematic review and meta-analysis of randomized clinical trials.PMIDZarezadeh M, Dehghani A, Faghfouri AH, Radkhah N, Naemi Kermanshahi M, Hamedi Kalajahi F et al. · Obesity Science & Practice · 2022
Inositol supplementation significantly reduced BMI, particularly in women with PCOS, with greater effects observed at higher doses and longer durations.
- 10Myo-inositol supplementation for the prevention of gestational diabetes: A meta-analysis of randomized controlled trialsPMIDLi L, Fang J · European journal of obstetrics, gynecology, and reproductive biology · 2022
Li L, Fang J. Myo-inositol supplementation for the prevention of gestational diabetes: A meta-analysis of randomized controlled trials. European journal of obstetrics, gynecology, and reproductive biology. 2022
- 11Inositol and Non-Alcoholic Fatty Liver Disease: A Systematic Review on Deficiencies and SupplementationPMIDPani A, Giossi R, Menichelli D et al. · Nutrients · 2020
Pani A, Giossi R, Menichelli D et al.. Inositol and Non-Alcoholic Fatty Liver Disease: A Systematic Review on Deficiencies and Supplementation. Nutrients. 2020
- 12Effects of inositol on glucose homeostasis: Systematic review and meta-analysis of randomized controlled trialsPMIDMinaeilozzi S et al. · Clin Nutr · 2018
Inositol supplementation decreases blood glucose through improvement in insulin sensitivity independent of weight.
- 13Myo-inositol effects in women with PCOS: a meta-analysis of randomized controlled trialsPMIDUnfer V et al. · Endocr Connect · 2017
Myo-inositol had beneficial effects improving the metabolic profile of women with PCOS and reducing hyperandrogenism.
- 14Efficacy and safety of D-chiro-inositol plus myo-inositol in polycystic ovary syndrome: a meta-analysisSource linkedPMIDUnfer V, Facchinetti F, Orru B et al. · Eur Rev Med Pharmacol Sci · 2017
- 15A meta-analysis of inositol for depression and anxiety disordersPMIDMukai T et al. · Hum Psychopharmacol · 2014
Four RCTs in anxiety disorders (70 patients) found no statistically significant effects of inositol; more robust trials needed.
Randomized controlled trials
3- 16Inositol treatment of obsessive-compulsive disorderSource linkedPMIDFux M, Levine J, Aviv A, Belmaker RH · Am J Psychiatry · 1996
- 17Double-blind, placebo-controlled, crossover trial of inositol treatment for panic disorderPMIDBenjamin J et al. · Am J Psychiatry · 1995
Frequency and severity of panic attacks and agoraphobia declined significantly more after inositol than placebo, with minimal side effects.
- 18Inositol treatment of panic disorder: a double-blind controlled crossover trialSource linkedPMIDBenjamin J, Levine J, Fux M et al. · Am J Psychiatry · 1995
Reviews & position papers
1- 19Myo-inositol in patients with polycystic ovary syndrome: a novel method for ovulation inductionSource linkedPMIDUnfer V, Carlomagno G, Dante G, Facchinetti F · Gynecol Endocrinol · 2011
Reference material
2- 20Unfer V, Nestler JE, Kamenov ZA et al.. Effects of Inositol(s) in Women with PCOS: A Systematic Review of Randomized Controlled Trials. International journal of endocrinology. 2016Source linkedPMID
- 21Nazirudeen R, Sridhar S, Priyanka R et al.. A randomized controlled trial comparing myoinositol with metformin versus metformin monotherapy in polycystic ovary syndrome. Clinical endocrinology. 2023Source linkedPMID
Common questions.
Quick answers about Inositol, drawn from the data on this page.
What is Inositol?
Sugar alcohol involved in insulin signaling and neurotransmitter function.
What is Inositol used for?
Commonly cited benefits of Inositol include: PCOS support; Anxiety reduction; Insulin sensitivity; Fertility. NutriStack rates the overall evidence as strong.
What is a typical dose of Inositol?
A typical adult dose of Inositol is 2-4 g myo-inositol daily (40:1 ratio with D-chiro for PCOS). The commonly recommended form is Myo-inositol powder (most researched for PCOS). These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Inositol?
Reported side effects include gi upset at high doses, nausea, flatulence. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Inositol?
NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Inositol in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.