Myo-Inositol

Often combined for fertility support

Enhanced reproductive health and egg quality

⟡ Spearmint

Myo-inositol improves insulin sensitivity in PCOS while spearmint reduces androgens; together they address both metabolic and androgenic components of PCOS

Comprehensive PCOS management targeting insulin resistance and androgen excess

Top studies from 39+ peer-reviewed papers

📚meta-analysisn=1319

Motuhifonua SK et al. • The Cochrane database of systematic reviews (2023)

“Evidence from seven studies shows that antenatal dietary supplementation with myo-inositol during pregnancy may reduce the incidence of gestational diabetes, hypertensive disorders of pregnancy and preterm birth.”

Key Findings:

For the primary neonatal outcomes, only one study measured the risk of a large-for-gestational-age infant and found myo-inositol was associated with both appreciable benefit and harm (RR 1.40, 95% CI 0.65 to 3.02; 1 study, 234 infants; low-certainty evidence).
Further, myo-inositol may result in little to no difference in caesarean section (RR 0.91, 95% CI 0.77 to 1.07; 4 studies, 829 women; low-certainty evidence).
For the secondary neonatal outcomes, meta-analysis showed no neonatal hypoglycaemia (RR 3.07, 95% CI 0.90 to 10.52; 4 studies; 671 infants; very low-certainty evidence).
However, myo-inositol may be associated with a reduction in the incidence of preterm birth (RR 0.35, 95% CI 0.17 to 0.70; 4 studies; 829 infants).

📚meta-analysisn=1321

Wei J et al. • Nutrients (2022)

“In conclusion, 4 g MI nutritional supplementation per day during early pregnancy may reduce GDM incidence and severity, therefore may be a practical and safe approach for the prevention of GDM.”

Key Findings:

Pooled results were expressed as relative risk (RR) or mean difference (MD) with a 95% confidence interval (95% CI).
Compared with the control group, 4 g myo-inositol (MI) supplementation per day significantly decreased the incidence of GDM (RR = 0.30, 95% CI (0.18, 0.49), p < 0.00001).
It also decreased the need of insulin treatment, and reduced the incidence of preterm delivery and neonatal hypoglycemia.
However, no difference was observed between 1.1 g MI per day plus 27.6 mg D-chiro-inositol (DCI) per day and the control group regarding all evaluated results.

📚meta-analysisn=612

Zhang JQ et al. • European review for medical and pharmacological sciences (2022)

“Compared with metformin, the suitable supplemental dosage of myo-ins may be helpful in lowering levels of TG and avoiding adverse events (AEs).”

Key Findings:

Compared with metformin, the suitable supplemental dosage of myo-ins may be helpful in lowering levels of TG and avoiding adverse events (AEs).
Further research warranted to confirm findings

📚meta-analysisn=7760

Showell MG et al. • The Cochrane database of systematic reviews (2020)

“In this review, there was low- to very low-quality evidence to show that taking an antioxidant may benefit subfertile women.”

Key Findings:

Due to the very low-quality of the evidence we are uncertain whether antioxidants improve live birth rate compared with placebo or no treatment/standard treatment (odds ratio (OR) 1.81, 95% confidence interval (CI) 1.36 to 2.43; P < 0.001, I2 = 29%; 13 RCTs, 1227 women).
This suggests that among subfertile women with an expected live birth rate of 19%, the rate among women using antioxidants would be between 24% and 36%.
Low-quality evidence suggests that antioxidants may improve clinical pregnancy rate compared with placebo or no treatment/standard treatment (OR 1.65, 95% CI 1.43 to 1.89; P < 0.001, I2 = 63%; 35 RCTs, 5165 women).
This suggests that among subfertile women with an expected clinical pregnancy rate of 19%, the rate among women using antioxidants would be between 25% and 30%.

📚meta-analysisn=4451

Compare with Others Find Based on Your Goals

Morley LC et al. • The Cochrane database of systematic reviews (2017)

“Our updated review suggests that metformin alone may be beneficial over placebo for live birth, although the evidence quality was low.”

Key Findings:

Metformin versus placebo or no treatmentThe evidence suggests that metformin may improve live birth rates compared with placebo (OR 1.59, 95% CI 1.00 to 2.51, 4 studies, 435 women, I2 = 0%, low-quality evidence).
There was no clear evidence of a difference in miscarriage rates (OR 1.08, 95% CI 0.50 to 2.35, 4 studies, 748 women, I2 = 0%, low-quality evidence).
However, the combined therapy group had higher rates of clinical pregnancy (OR 1.59, 95% CI 1.27 to 1.99, 16 studies, 1529 women, I2 = 33%, moderate-quality evidence) and ovulation (OR 1.57, 95% CI 1.28 to 1.92, 21 studies, 1624 women, I2 = 64%, moderate-quality evidence).
Metformin versus clomiphene citrateWhen all studies were combined, findings for live birth were inconclusive and inconsistent (OR 0.71, 95% CI 0.49 to 1.01, 5 studies, 741 women, I2 = 86%, very low-quality evidence).

View all 39+ studies

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Myo-Inositol

vitamin

Myo-Inositol

First-line natural treatment for PCOS that improves insulin sensitivity and ovulation — also reduces anxiety, panic, and OCD symptoms.

bodymentalPCOSfertilityinsulin sensitivityanxiety

39+ studies

Evidence

Reviewed 19 days ago

high

Safety

2-4g daily for PCOS; up to 12-18g for anxiety

Dose

8-24 weeks

Time to Effect

Myo-inositol powder

Best Form

Mechanisms of Action

📊

Insulin Signaling

Acts as a second messenger in insulin pathways

🧠

Serotonin Modulation

Enhances serotonin receptor sensitivity

🌸

Ovarian Function

Supports healthy egg development and ovulation

Biological PathwayBeta

How Myo-Inositol works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.

Supplement

Molecular Target

Biological Process

Health Outcome

Strong

Moderate

Emerging

strong

moderate

emerging

Tap node to isolate • Pinch to zoom • Tap edge for research

Recommended Dose

2-4g daily for PCOS; up to 12-18g for anxiety

2000mg18000mg

Loading: Start with 2g and increase gradually. PCOS typically uses 2-4g; anxiety disorders may use 12-18g.

Optimal Timing

Divided doses with meals
Morning and evening

Take with food

Available Forms

Form	Type
🧪Myo-inositol powder	Recommended
💊Capsules	Alternative
💊Myo-inositol + D-chiro-inositol combinations	Alternative

Powder is most cost-effective for higher doses. 40:1 ratio of myo to D-chiro-inositol mimics natural physiological ratio and is often used for PCOS.

Duration

Minimum: 8 weeks

Optimal: 24 weeks

Cycling: Not required

Note: Often combined with D-chiro-inositol in 40:1 ratio for PCOS. For anxiety, higher doses divided throughout the day.

🌸

Improved Ovulation

More regular menstrual cycles and ovulation

📅 3-6 months

75% of users notice thispositive

😌

Reduced Anxiety

Decreased anxiety and panic symptoms

⏱️ 4-6 weeks

70% of users notice thispositive

📊

Better Insulin Sensitivity

Improved blood sugar regulation

📅 2-3 months

70% of users notice thispositive

😣

GI Effects

May cause nausea or diarrhea at high doses

📅 Initial use or high doses

20% of users notice thistrade-off

High SafetyMax safe dose: 18g/day used in anxiety studies

🟡

Pregnant

Often used for gestational diabetes prevention; consult healthcare provider

🟡

PCOS patients

First-line natural treatment; well-studied

Who Should NOT Take This

Bipolar disorder (may trigger mania at high doses)

Drug Interactions

Lithiummoderate

Lithium depletes inositol; supplementation may help but consult psychiatrist

Diabetes medicationsmild

May enhance blood sugar lowering; monitor glucose

Possible Side Effects

Nausea

milduncommon

Tip: Take with food; start with lower dose

Diarrhea

milduncommon

Tip: Reduce dose; divide doses throughout day

Warnings

High doses (12g+) needed for anxiety effects
Use caution in bipolar disorder

⟡ Methylfolate

Often combined for fertility support

Enhanced reproductive health and egg quality

⟡ Spearmint

Myo-inositol improves insulin sensitivity in PCOS while spearmint reduces androgens; together they address both metabolic and androgenic components of PCOS

Comprehensive PCOS management targeting insulin resistance and androgen excess

Top studies from 39+ peer-reviewed papers

📚meta-analysisn=1319

Motuhifonua SK et al. • The Cochrane database of systematic reviews (2023)

“Evidence from seven studies shows that antenatal dietary supplementation with myo-inositol during pregnancy may reduce the incidence of gestational diabetes, hypertensive disorders of pregnancy and preterm birth.”

Key Findings:

For the primary neonatal outcomes, only one study measured the risk of a large-for-gestational-age infant and found myo-inositol was associated with both appreciable benefit and harm (RR 1.40, 95% CI 0.65 to 3.02; 1 study, 234 infants; low-certainty evidence).
Further, myo-inositol may result in little to no difference in caesarean section (RR 0.91, 95% CI 0.77 to 1.07; 4 studies, 829 women; low-certainty evidence).
For the secondary neonatal outcomes, meta-analysis showed no neonatal hypoglycaemia (RR 3.07, 95% CI 0.90 to 10.52; 4 studies; 671 infants; very low-certainty evidence).
However, myo-inositol may be associated with a reduction in the incidence of preterm birth (RR 0.35, 95% CI 0.17 to 0.70; 4 studies; 829 infants).

📚meta-analysisn=1321

Wei J et al. • Nutrients (2022)

“In conclusion, 4 g MI nutritional supplementation per day during early pregnancy may reduce GDM incidence and severity, therefore may be a practical and safe approach for the prevention of GDM.”

Key Findings:

Pooled results were expressed as relative risk (RR) or mean difference (MD) with a 95% confidence interval (95% CI).
Compared with the control group, 4 g myo-inositol (MI) supplementation per day significantly decreased the incidence of GDM (RR = 0.30, 95% CI (0.18, 0.49), p < 0.00001).
It also decreased the need of insulin treatment, and reduced the incidence of preterm delivery and neonatal hypoglycemia.
However, no difference was observed between 1.1 g MI per day plus 27.6 mg D-chiro-inositol (DCI) per day and the control group regarding all evaluated results.

📚meta-analysisn=612

Zhang JQ et al. • European review for medical and pharmacological sciences (2022)

“Compared with metformin, the suitable supplemental dosage of myo-ins may be helpful in lowering levels of TG and avoiding adverse events (AEs).”

Key Findings:

Compared with metformin, the suitable supplemental dosage of myo-ins may be helpful in lowering levels of TG and avoiding adverse events (AEs).
Further research warranted to confirm findings

📚meta-analysisn=7760

Showell MG et al. • The Cochrane database of systematic reviews (2020)

“In this review, there was low- to very low-quality evidence to show that taking an antioxidant may benefit subfertile women.”

Key Findings:

Due to the very low-quality of the evidence we are uncertain whether antioxidants improve live birth rate compared with placebo or no treatment/standard treatment (odds ratio (OR) 1.81, 95% confidence interval (CI) 1.36 to 2.43; P < 0.001, I2 = 29%; 13 RCTs, 1227 women).
This suggests that among subfertile women with an expected live birth rate of 19%, the rate among women using antioxidants would be between 24% and 36%.
Low-quality evidence suggests that antioxidants may improve clinical pregnancy rate compared with placebo or no treatment/standard treatment (OR 1.65, 95% CI 1.43 to 1.89; P < 0.001, I2 = 63%; 35 RCTs, 5165 women).
This suggests that among subfertile women with an expected clinical pregnancy rate of 19%, the rate among women using antioxidants would be between 25% and 30%.

📚meta-analysisn=4451

Compare with Others Find Based on Your Goals

Morley LC et al. • The Cochrane database of systematic reviews (2017)

“Our updated review suggests that metformin alone may be beneficial over placebo for live birth, although the evidence quality was low.”

Key Findings:

Metformin versus placebo or no treatmentThe evidence suggests that metformin may improve live birth rates compared with placebo (OR 1.59, 95% CI 1.00 to 2.51, 4 studies, 435 women, I2 = 0%, low-quality evidence).
There was no clear evidence of a difference in miscarriage rates (OR 1.08, 95% CI 0.50 to 2.35, 4 studies, 748 women, I2 = 0%, low-quality evidence).
However, the combined therapy group had higher rates of clinical pregnancy (OR 1.59, 95% CI 1.27 to 1.99, 16 studies, 1529 women, I2 = 33%, moderate-quality evidence) and ovulation (OR 1.57, 95% CI 1.28 to 1.92, 21 studies, 1624 women, I2 = 64%, moderate-quality evidence).
Metformin versus clomiphene citrateWhen all studies were combined, findings for live birth were inconclusive and inconsistent (OR 0.71, 95% CI 0.49 to 1.01, 5 studies, 741 women, I2 = 86%, very low-quality evidence).

View all 39+ studies

What would you like to do next?

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