D-Chiro-Inositol
vitamins
D-Chiro-Inositol is a naturally occurring isomer of inositol, a pseudo-vitamin found in foods and synthesised by the body. It plays a crucial role in insulin signalling and glucose metabolism, making it particularly valuable for metabolic health. Research suggests it may benefit those with insulin resistance and polycystic ovary syndrome (PCOS).
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Benefits
Dosage
Typical Dose
500–1,200 mg daily
Upper Limit
2,000–4,000 mg daily
Timing
With meals to enhance absorption and minimise gastrointestinal discomfort
Forms & Bioavailability
Powder
High bioavailability; easily dissolved and absorbed when taken with food
Capsule
Good bioavailability; convenient dosing with consistent absorption
Tablet
Moderate bioavailability; dependent on formulation and individual digestive capacity
Side Effects
Interactions
Research Summary
Clinical evidence supports D-Chiro-Inositol's role in improving insulin sensitivity and supporting ovulatory function in women with PCOS. Several randomised controlled trials demonstrate improvements in hormonal markers and metabolic parameters, though optimal dosing and long-term safety require further investigation. The compound's effectiveness is often enhanced when combined with myo-inositol in a specific ratio.
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The Bottom Line on D-Chiro-Inositol
D-Chiro-Inositol is moderately researched with promising but sometimes mixed evidence.It is most commonly used for improved insulin sensitivity and enhanced glucose metabolism. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for D-Chiro-Inositol
See how D-Chiro-Inositol can help with specific health goals: