Inositol promotes production of lecithin in the human body and may be important to the eyes, skin, and cardiovascular system.  Also, it has many other uses including treatment of depression and is necessary for proper function of nerves, brain, and muscles. Inositol is necessary for the formation of lecithin and functions closely with a B complex vitamin, Choline. Being a fundamental ingredient of cell membranes, it is necessary for proper function of nerves, brain, and muscles in the body. Inositol is primarily used in the treatment of liver problems, depression, panic disorder, and diabetes.  Inositol also aids in the breakdown of fats, helps in the reduction of blood cholesterol, and helps to prevent thinning hair.