Wizard of Vitamins

Inositol Vitamin

What is Inositol?

Inositol is part of the vitamin B-complex. It is required for proper formation of cell membranes. 

Inositol in Diets

Nuts, beans, wheat and wheat bran, cantaloupe, and oranges are excellent sources of inositol. Most dietary inositol is in the form of phytate.

Inositol Medicinal Treatments

Anxiety Depression Obsessive-compulsive disorder Bipolar disorder/manic depression Type 1 diabetes Type 2 diabetes

Known Consequences of Inositol Deficiency

Clear deficiency of inositol has not been reported, although people with diabetes have increased excretion and may benefit from inositol supplementation.

Inositol Recommended Dosages

Most people do not need to take inositol. In addition, the small amounts commonly found in multivitamin supplements are probably unnecessary and ineffective. Doctors sometimes suggest 500 mg twice per day. For depression, anxiety, and obsessive-compulsive disorder, 12–18 grams per day has been shown to be effective in double-blind trials.

Inositol Side Effects

Toxicity has not been reported, although people with chronic renal failure show elevated levels and should not take inositol, except under medical supervision. Large amounts of phytate, the common dietary form of inositol, reduce the absorption of calcium, iron, and zinc. However, supplemental inositol does not have this effect. One review article suggested that inositol may stimulate uterine contractions. While no research has demonstrated that inositol actually has this effect, women who are or could become pregnant should consult a doctor before taking inositol. Certain medicines may interact with inositol. Refer to drug interactions for a list of those medicines.