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Biotin![]() |
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Biotin works with other b vitamin to help break down proteins, fats, and carbohydrates for energy in the body. Biotin is needed to convert folic acid into the active form used by the body. A biotin deficiency in humans is rare, even when biotin-deficient diet is consumed. Symptoms of deficiency include poor appetite, nausea, skin problems, fatigue, mascle pain, hair loss, and increased colds and infections.