Inositol (specifically myo-inositol) is a stereoisomer known as a pseudovitamin for its close relation to B-complex vitamins without having the same physiologic action as actual B vitamins. Though it is often referred to as Vitamin B8, inositol is actually a type of sugar which has several important bodily functions such as making up cell membranes, influencing the action of insulin, and helping to regulate neurotransmitter levels. Inositol is naturally found in foods such as fruits, beans, grains, and nuts and the average American diet provides a dosage of around 1 gram per day. However, supplemental dosages are often much higher. Inositol has become popular as a supplement to help balance hormone levels and promote fertility in women after several promising studies.