WHAT OTHER NAMES IS BIOTIN KNOWN BY?Biotina, Biotine, Biotine-D, Coenzyme R, D-Biotin, Vitamin B7, Vitamin H, Vitamine B7, Vitamine H, W Factor, Cis-hexahydro-2-oxo-1H-thieno[3,4-d]-imidazole-4-valeric Acid. Biotin is a vitamin that is found in small amounts in numerous foods. Biotin is used for preventing and treating biotin deficiency associated with pregnancy, long-term tube feeding, malnutrition, and rapid weight loss. It is also used orally for hair loss, brittle nails, skin rash in infants (seborrheic dermatitis), diabetes, and mild depression. Biotin can effectively treat and prevent biotin deficiency. But biotin deficiency is very rare and taking supplements is not usually necessary. There is some scientific evidence that it might help for brittle finger and toenails. There isn't enough information to know if biotin is effective for the other conditions people use it for, including: malnutrition, hair loss, diabetes, and others. LIKELY EFFECTIVE FOR...- Treating and preventing biotin deficiency. Symptoms of deficiency include thinning of the hair (often with loss of hair color), and red scaly rash around the eyes, nose, and mouth. Other symptoms include depression, listlessness, hallucinations, and tingling in the arms and legs. There is some evidence that cigarette smoking may cause mild biotin deficiency.