D-Chiro-Inositol
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D-Chiro-Inositol. Complementary inositol used in 40:1 myo-inositol ratio for PCOS.
How it works. Second messenger for insulin in androgen-producing tissues; lowers androgens.
What the research supports. 1 graded claims. Strongest: Lowers free T in PCOS women (moderate).
How much to take. Typical dose: 50 mg paired with 2 g myo-inositol.
Side effects and interactions. 1 medication interaction listed. Serious: Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing.
Stacking. Pairs well with A high-quality multivitamin, Omega-3 (EPA/DHA).
Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.
Key studies. 8 studies cited. The strongest are listed with links to PubMed.
Community. Experiences from people who have tried D-Chiro-Inositol. Anecdotes are not medical advice.
D-Chiro-Inositol. Complementary inositol used in 40:1 myo-inositol ratio for PCOS.
What it is
Complementary inositol used in 40:1 myo-inositol ratio for PCOS.
Food sources
Goals
How it works
Second messenger for insulin in androgen-producing tissues; lowers androgens.
Pathways
- Second messenger for insulin in androgen-producing tissues
- lowers androgens
Effects
- ↓free T in PCOS women decreases
What the research supports
Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.
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Side effects & interactions
Common side effects
- D-Chiro-Inositol is generally well-tolerated at evidence-based doses
- Mild GI discomfort (nausea, loose stools, or bloating) possible at higher intakes
- Headache or transient fatigue reported by a small fraction of users
Serious
- Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing
Medication interactions
Always disclose D-Chiro-Inositol use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.
Check any supplement–medication combination with your pharmacist before starting.
Combines with
Pairs well
- A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
- Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.
Common forms
- Capsule or softgel
- Powder
- Sublingual or buccal
- Liposomal liquid
Key studies
8 studies cited in total.
Opens current human and preclinical literature matching D-Chiro-Inositol and "Lowers free T in PCOS women". Filter by RCT, meta-analysis, or year on the results page.
Opens current human and preclinical literature matching D-Chiro-Inositol and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.
Opens current human and preclinical literature matching D-Chiro-Inositol and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.
Discussion
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