Biotin (also know as vitamin B8) is a vitamin that acts in the metabolism of amino acids and other acids. Pantothenic acid (also known as vitamin B5) is important for the aerobic cellular respiration since it acts in the transport of acetyl and acyl radicals. Biotin is made by bacteria that live in the human digestive tube (under interspecific harmonious ecological interaction) and this supply in general is enough for the body. Biotin and pantothenic acid are found in vegetables, cereals, eggs, fish, milk and lean meat.