Inositol by definition is: Any of nine isomeric alcohols, especially one found in plant and animal tissue and classified as a member of the vitamin B complex. Inositol is needed for health at cellular level and a fair concentration is found in the lens of the human eye as well as the heart. Men taking extra inositol reported that their hair loss had improved, with less hair falling out – although this has not been tested under clinical situations. Inositol plays an important part in the health of cell membranes especially the specialized cells in the brain, bone marrow, eyes and intestines. The function of the cell membranes is to regulate the contents of the cells, which makes effective functioning possible.