Myoinositol is found in the diet. Once consumed, it is transformed to phosphatidylinositol, where it is found in the cell membranes of all eukaryotic cells. Phosphatidylinositol levels influence hormones that regulate metabolism, energy usage and storage, and the stress response. Inositol can stimulate glucose uptake from the blood into skeletal muscle, resulting in decreased blood glucose levels. Myoinositol and d-chiro inositol are two insulin sensitizers that are stereoisomers. The ratio of these two forms of inositol varies by tissue. Women with polycystic ovarian syndrome have higher insulin levels, which may enhance the transfer of myoinositol to d-chiro inositol in the ovary. A relative deficiency of myoinositol can impair signals to the developing oocyte.