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Myo-Inositol
Vitamin-like compound that supports mood, sleep, and hormonal balance, with strong evidence for anxiety, OCD, and PCOS.
What the evidence says
Inositol helped in about half (10/15) of the studies that measured an effect — promising, but not unanimous.
Most evidence is from high-quality meta-analyses and randomised trials published 2001–2026 with a typical study size of 464 participants.
Based on 65 studies · 26 meta-analyses · 21 RCTs · 48,899 total participants
Confidence
HighWhat the studies found
By outcome
Inositol has an evidence score of 8/10 — strong evidence based on 64 indexed studies, including 19 meta-analyses. Vitamin-like compound that supports mood, sleep, and hormonal balance, with strong evidence for anxiety, OCD, and PCOS.
The commonly studied dose of Inositol is 2-4g for general anxiety; 12-18g for OCD/panic. Research points to an estimated optimal dose around 4000mg, with a minimum effective dose near 2000mg. Individual response varies — start low and adjust.
Timing is flexible for Inositol — consistent daily use matters more than the time of day. Inositol (particularly myo-inositol) functions as a second messenger in insulin signaling, serotonin receptor function, and phospholipid metabolism.
Myo-Inositol
Probably helpsFirst-line natural treatment for PCOS that improves insulin sensitivity and ovulation — also reduces anxiety, panic, and OCD symptoms.
Magnesium
Probably helpsSupports 300+ enzymatic reactions — critical for sleep, stress response, muscle function, and cognitive health.
Last reviewed May 2026 · evidence from 38 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Inositol is a carbocyclic sugar naturally found in the body and in foods. It plays a key role in cell signaling, particularly in serotonin and insulin pathways. Research shows significant benefits for anxiety, OCD, panic disorder, and PCOS. Often used as a gentler alternative to or adjunct with anxiety medications.
Supports serotonin receptor function
Supports insulin sensitivity
Critical for cellular communication
How 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.
Tap node to isolate • Pinch to zoom • Tap edge for research
2-4g for general anxiety; 12-18g for OCD/panic
Can be taken without food
| Form | Type |
|---|---|
| 🧪Myo-inositol powder (most economical for higher doses) | Recommended |
| 💊Capsules | Alternative |
| 💊D-chiro-inositol (for PCOS, in 40:1 ratio with myo) | Alternative |
Powder dissolves well and tastes slightly sweet. For PCOS, combination of myo-inositol and D-chiro-inositol in 40:1 ratio is optimal.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Higher doses (12-18g) for OCD/panic need to be split throughout the day. For sleep, take portion before bed.
Based on multiple meta-analyses showing inositol benefits for PCOS including improved menstrual regularity, hormonal parameters, and metabolic markers. Evidence quality varies across studies with some limitations noted in systematic reviews.
Significant decrease in anxiety symptoms
Reduced obsessive thoughts and compulsions
Improved ovulation and metabolic markers
Nausea or loose stools at high doses
Used in PCOS fertility treatment; generally considered safe
Use with caution; may trigger manic episodes
May have additive serotonin effects; often combined safely under supervision
Lithium may reduce inositol levels; supplementation may be beneficial
Tip: Start low and increase gradually; take with food
Tip: Reduce dose
Tip: Usually resolves with continued use
Inositol is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are nausea, diarrhea, headache. Use caution if any of these apply to you: Bipolar disorder (may trigger mania at high doses).
Ashwagandha
Likely helpsReduces cortisol and anxiety while improving sleep quality and physical recovery in stressed adults.