D-chiro-Inositol
1D-chiro-Inositol
Chemical compound
1D-chiro-Inositol[2] (formerly D-chiro-inositol, commonly abbreviated DCI) is a member of a family of related substances often referred to collectively as "inositol", although that term encompasses several isomers of questionable biological relevance, including 1L-chiro-inositol. myo-Inositol is converted into DCI by an insulin dependent NAD/NADH epimerase enzyme.[3][4][5][6][7] It is known to be an important secondary messenger in insulin signal transduction. DCI accelerates the dephosphorylation of glycogen synthase and pyruvate dehydrogenase, rate limiting enzymes of non-oxidative and oxidative glucose disposal. DCI may act to bypass defective normal epimerization of myo-inositol to DCI associated with insulin resistance and at least partially restore insulin sensitivity and glucose disposal.[8] One pilot study found males taking it had increased androgens and reduced estrogen.[9]