Biotin also know as Vitamin B7, plays an important role maintaining healthy hair, skin, and nails. Biotin deficiency is linked to a number of skin conditions. Deficiency can also lead to hair loss, which is reversible with biotin supplementation. Biotin may enhance the quality of brittle nails, with patients exhibiting firmer, harder, and thick nails after treatment. Choline is an essential nutrient vital for the synthesis of the key components of cell membranes. Without choline, basic cell structure, metabolism, and the transportation of nutrients through the body do not happen. At GNA Naturals, we triple test all our products and guarantee the highest quality and purity. We value our customers as your satisfaction is the cornerstone of our philosophy.