Bio-H-Tin Vitamin H 5 mg 120 tabletsThe original with a recognized effect Vitamin H also called hair and nail vitamin makes a significant contribution to keeping your hair and nails healthy. It stimulates the formation of keratin, the structural substance of nails and hair. Soft and brittle nails are strengthened and the quality of brittle or dull hair is improved. Like all vitamins, vitamin H must be supplied to the body in sufficient quantities with food. However, you can only achieve