Vitamin H is also known as Biotin.
Sources of vitamin H include: almonds, peanuts, pecans, walnuts, cauliflower, bananas, organ meat, & egg yolk. Raw egg whites contain a protein called Avidin that interferes with the body’s absorption of biotin.
People who are deficient in vitamin H may suffer from neurological disorders, growth retardation and skin abnormalities such as: hair loss, dry scaly skin, cracking in the corners of the mouth (cheilitis), swollen and painful tongue that is magenta in color (glossitis), dry eyes, loss of appetite, fatigue, insomnia, and depression.
The average adult should be getting 30 mcg/day of vitamin H. Vitamin H may help hair re-grow(if lost due to diet), strengthen fingernails up to 60-90%, and possibly help those with diabetes mellitus.