Biotin Vitamin H, more commonly known as biotin, is a water-soluble vitamin produced in the body by certain types of intestinal bacteria and obtained from food. Considered part of the B complex group of vitamins, biotin is necessary for the metabolism of carbohydrates, fats, and amino acids (the building blocks of protein). Deficiency may result in hair loss, dry scaly skin, cracking in the corners of the mouth (called cheilitis), swollen and painful tongue that is magenta in color (glossitis), dry eyes, loss of appetite, fatigue, insomnia, and depression.
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