1.6.8 Biotin (vitamin H)
Although biotin is usually considered to be a member of the B vitamin complex, it is also sometimes known as vitamin H. Like pantothenic acid, it plays a major role in metabolism. Deficiency is not normally seen, though it can be induced in rats and people by them eating large quantities of raw egg white. This binds biotin and prevents it being absorbed. Various symptoms result, including hair loss, dermatitis, depression and lethargy.