Myo-inositol is a naturally occurring carbocyclic sugar found throughout the body, where it plays a key role in cellular signaling, particularly as a component of secondary messenger systems involving insulin and various neurotransmitters. Though often grouped with B-vitamins and amino acid compounds, it is technically a sugar alcohol that the body can synthesize on its own. Research suggests that myo-inositol may support healthy blood sugar metabolism and hormonal balance, with a notable body of evidence exploring its role in polycystic ovary syndrome, where studies indicate it may help improve ovarian function and fertility outcomes. Additional research has investigated its potential to promote calmness and emotional well-being, with some clinical trials finding promising results related to anxiety, OCD symptoms, and sleep quality when used as a supplemental powder.
Compare this supplementResearch suggests a mixed and largely preliminary picture when it comes to myo-inositol and sleep quality. The most d...
View studies →Research suggests that the available evidence directly examining myo-inositol for anxiety relief cannot be meaningful...
View studies →Research suggests that myo-inositol may play a role in blood sugar regulation, though the available evidence linked h...
View studies →The studies provided do not contain research on Myo-Inositol or fertility support. Both studies investigate plant bio...
View studies →Research suggests that myo-inositol may offer benefits for women with PCOS during pregnancy, though direct, high-qual...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Capsule | 2–4 g | Twice daily | Fertility support in women with PCOS | Often combined with D-chiro-inositol (40:1 ratio); supported by multiple RCTs including Monastra et al. |
| Powder | 2–4 g | Daily | Blood sugar regulation and metabolic support | Common in clinical trials examining insulin sensitivity and glucose metabolism |
| Powder | 12–18 g | Daily | OCD support and anxiety relief | Higher doses studied in RCTs by Fux et al. and Benjamin et al. for OCD and panic disorder |
| Powder | 2–4 g | Twice daily | PCOS support, fertility, and insulin resistance | Widely used in RCTs for PCOS; 4g/day total common in Unfer et al. and multiple meta-analyses |
| Powder | 2 g | Twice daily | Sleep quality and general mood support | 4g/day dose observed in studies examining anxiolytic and sleep-related outcomes |