What is in this * Myo & D-Chiro Inositol are isomers (compounds with the same formula, but different structural arrangement) of inositols, which are organic compounds found widely in nature particularly in fiber-rich foods. Our bodies naturally create inositols from glucose, too, and are mainly found in cell membranes*. * MTHF is the predominant, natural and bioactive form of folate, or vitamin B9. Both the synthetic form (folic acid) and the natural folate form (found in foods) are converted in the body to MTHF*. * Vitamin D3 (cholecalciferol) is organically produced in the body when the skin is exposed to UVB rays from the sun, which triggers its synthesis. Vitamin D3 can also be obtained from the diet in animal foods (fatty fish, egg yolk)*. What are the uses * Myo & D-Chiro Inositol are molecules that mainly act as insulin mediators and both work synergistically in processes that increase insulin sensitivity and in glucose metabolism. With these functions, Myo & D-Chiro Inositol is often used for conditions associated with insulin resistance, such as PCOS*. * MTHF is most widely known for its use during pregnancy, when adequate intake is extremely important for proper growth. However, MTHF supplementation can also be used to decrease levels of homocysteine elevated levels can cause harmful effects to the body*. * Vitamin D3 is needed for bone growth, immunity, and reducing inflammation. In PCOS, vitamin D may have a beneficial impact on insulin resistance and glucose tolerance*. *See Legal Disclaimer below.