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Supplement

D-Chiro-Inositol

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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 is factual context, not a clinical-risk assessment. Laws vary by country.

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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 is context-specific and belongs in a healthcare conversation.

Factual research context from published sources — not a clinical-risk assessment or guidance. Research classifications may change as new data emerges.

Related Approaches

Other Supplement tracked on Narrated.

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