PureBulk, Inc.
D-Chiro Inositol (DCI)
Pickup available at PureBulk, Inc. during business hours. (7:00am-3:00pm M-F)
Usually ready in 24 hours
Supplement Facts
Serving Size: 150 mgServings Per Container: Varies
| Amount Per Serving | % Daily Value |
|---|---|
| D-Chiro Inositol 150 mg | † |
† Daily Value Not Established
‡These supplement facts may vary from the product you receive. Please call for exact numbers.
Other Ingredients: None
Free of: Added Sugar, Dairy, Soy, Wheat, Corn, and Yeast.
Directions: As a dietary supplement, take 150 mg twice daily with food, or as directed by a healthcare professional. Use an accurate milligram scale for measurement.
Warning: If you are pregnant or nursing, taking medications, or have a medical condition, consult a healthcare professional before use. Keep out of reach of children
Tested By Accredited 3rd Party Labs
PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity and potency. To receive a copy of these test results or any other PureBulk supplement please fill out the COA request form found here.
*NOTE: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
What is D-Chiro Inositol (DCI)?
D-Chiro Inositol (DCI) is a specialized, naturally occurring nutrient that supports cellular energy and hormonal balance. It shares a chemical structure with myo-inositol, but DCI performs a distinct role inside insulin-sensitive tissue. The body converts a small portion of myo-inositol into DCI in direct response to insulin, then puts it to work as an essential insulin messenger. This messenger helps cells store glucose efficiently in the liver and muscle while supporting healthy blood sugar metabolism.
Within ovarian tissue, DCI plays a separate, highly localized role. It helps regulate aromatase, the enzyme responsible for balancing androgen and estrogen levels. This dual identity, an insulin messenger throughout the body and a targeted regulator inside the ovary, is what makes DCI such a well-researched, singular nutrient.
Potential D-Chiro Inositol Benefits
Supports Healthy Insulin Signaling and Glucose Management
DCI's best-documented role is helping insulin work more efficiently at the cellular level. Clinical research has found that women with PCOS who took DCI daily for eight weeks experienced meaningfully improved insulin sensitivity, along with reductions in circulating free testosterone and cardiovascular strain. Because insulin resistance is a defining feature of PCOS metabolism, supporting this pathway is considered foundational to broader hormonal balance.
- Helps the body respond more efficiently to insulin's signal
- Supports normal glucose uptake into muscle and liver tissue for storage as glycogen
- Complements healthy blood sugar management already supported by diet and activity
- May help maintain healthy vascular responsiveness as part of overall metabolic wellness
Supports Normal Ovarian Enzyme Activity and Hormonal Balance
Within ovarian tissue, DCI's most notable role involves aromatase, the enzyme that governs how androgens convert into estrogen. Research shows DCI directly regulates the genes responsible for this enzyme's activity, a mechanism linked to the androgen elevations often seen with PCOS. Supporting this pathway at a balanced level is a primary reason DCI draws interest from women focused on hormonal balance.
- Supports normal enzymatic regulation of androgen-to-estrogen conversion in ovarian tissue
- May help support already-healthy androgen balance
- Works as a complementary piece of a broader approach to hormonal wellness, alongside diet, movement, and other targeted nutrients
Supports Regular Menstrual Cyclicity
In the same clinical research on insulin sensitivity, 86 percent of women taking DCI ovulated at least once during the study period, compared with just 27 percent taking a placebo. Regular ovulation is closely tied to menstrual regularity, making this one of the most consistently referenced outcomes in DCI research.
A Note on Working with Myo-Inositol
DCI and myo-inositol play different, ratio-dependent roles in ovarian tissue. Research has linked a physiological ratio of about 40 parts myo-inositol to 1 part DCI, mirroring blood plasma levels, with the most favorable outcomes for ovulatory function. Women interested in combining the two nutrients may want to discuss this ratio with a healthcare provider.
Potential D-Chiro Inositol Side Effects
Healthy adults generally tolerate D-Chiro Inositol well when taken in recommended serving ranges. When side effects occur, they are usually mild, limited to digestive discomfort such as bloating, gas, or a mild stomach upset, especially when a serving is taken without food.
Sustained, high-level DCI intake has been linked to menstrual cycle irregularities and elevated testosterone in some women, an effect tied to shifting away from the ovary's natural myo-inositol-to-DCI balance. This reinforces the importance of following label serving guidance, avoiding open-ended increases in serving size, and considering a balanced approach with myo-inositol for ovarian- and cycle-focused goals.
Individuals who are pregnant, nursing, managing diabetes or another blood sugar condition, or currently taking a prescription drug for insulin sensitivity or blood sugar management should consult a qualified healthcare provider before use. Anyone with an existing hormonal condition, including thyroid disorders, should also seek personalized guidance first.
References
- https://www.nejm.org/doi/full/10.1056/NEJM199904293401703
- https://www.endocrinepractice.org/article/S1530-891X(20)40239-3/abstract
- https://www.mdpi.com/2072-6643/15/8/1875
- https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2021.660381/full
- https://www.europeanreview.org/article/18223
- https://onlinelibrary.wiley.com/doi/10.1155/2016/9132052
- https://academic.oup.com/jcem/article/109/6/1630/7504796
- https://pmc.ncbi.nlm.nih.gov/articles/PMC5078644
- https://pmc.ncbi.nlm.nih.gov/articles/PMC11309080
){kind=link}