Solgar® Inositol 500 mg, also known as Vitamin B8, which is crucial for various biological functions in the body. Inositol is a vital part of cell membranes and is essential for cellular growth and operation. As a water-soluble compound, it is present in all cell membranes and serves a similar role as choline. While it can be produced in the body, Inositol is still considered a crucial nutrient. Some natural sources of Inositol include citrus fruits, lecithin oil, seeds, whole grains, nuts, and green leafy vegetables.