Biotin, also known as vitamin B7 or vitamin H, is a water-soluble B-complex vitamin ... A biotin deficiency, which is said to be rare, may lead to symptoms such as dry, scaly skin, brittle nails, and ...
and nails. Look for vitamins that contain essential nutrients like biotin, vitamin C, iron, and zinc. These vitamins are known to promote hair growth and strengthen hair follicles. Avoid products ...