Inositol

Recognized as part of the vitamin B complex and is closely associated with choline and biotin. It is found in high concentrations in lecithin. It is found in animal and in plant tissues. In animal tissues it occurs as a component of phospholipids; in plant cells it is found in phytic acid.
Inositol is a component of lecithin, along with choline. In combination with choline it prevents the fatty hardening of arteries and protects the liver. Large quantities of inositol are found in the spinal cord nerves and in the brain and cerebral spinal fluid. It is thought to be helpful in brain cell nutrition. It is needed for the growth and survival of cells in bone marrow, eye membranes and the intestines.