Biotin

Biotin, or vitamin H, C10H16N2O3S (Biotin; Coenzyme R, Biopeiderm), is a B-complex vitamin is important in the catalysis of essential metabolic reactions to synthesize fatty acids, in gluconeogenesis, and to metabolize leucine.

External links:

• http://www.orst.edu/dept/lpi/infocenter/vitamins/biotin/biotin.html
• http://www.recipnet.indiana.edu/common/Vitamins/Vitamin-H/Vitamin-H.htm