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Supplement

D-Chiro-Inositol

Also known as: DCI, D-chiro-inositol supplement

A stereoisomer of inositol often used alongside myo-inositol for PCOS management. Plays a distinct role in insulin signalling, particularly in non-ovarian tissues. Typically combined with myo-inositol in a 40:1 ratio. Excessive D-chiro-inositol alone may impair oocyte quality.

This page contains self-reported experiences from the Narrated community — not clinical data. Outcomes are subjective. Always consult your doctor or specialist before starting, stopping, or changing any approach.

Regulatory status does not mean an approach is safe or unsafe. Laws vary by country — check your local regulations.

Community Experiences

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Research Context

Research context compiled from published sources

How does D-Chiro-Inositol work?

Mediates insulin action in peripheral tissues (muscle, liver, adipose) via a glycosylphosphatidylinositol second messenger system. Supports glycogen synthesis and glucose disposal. In the ovary, elevated D-chiro-inositol may impair aromatase activity, so it is used in balance with myo-inositol rather than alone at high doses.

Research Depth

Unknown

Long-Term Evidence

Limited

Only short-term data available. Long-term effects are not well understood.

Known Interactions
Lithium (theoretical interaction)
Reported Contraindicated Populations
Women attempting conception (high doses alone may impair oocyte quality — use combined with myo-inositol)
Published Dose Ranges
50600 mg/dayoral · once or twice daily (often combined with myo-inositol in 40:1 ratio)
Clinical trials

Dose ranges from published research. Individual dosing should be determined with your healthcare provider based on your specific circumstances.

Factual research context from published sources — not a safety assessment or recommendation. Research classifications may change as new data emerges.

Related Approaches

Other Supplement tracked on Narrated.

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