... .Competitive price 3.Free samp Top Quality Biotin USP241,First Class of producing Biotin 2,CAS:58-85-5 3,MW ... 3 4.Formula:C10H16N2O3S Function:1) Biotin is the essential Nutrients of the retina,the Biotin deficiency could cause the Dry eyes, ... body's immune response and resistance.3) Biotin can maintain normal growth and development. Biotin deficiency will cause reproductive functions recession, bad ...