Not available from plant sources. May be helpful in treating epilepsy. Functions as building block for all proteins.
Helps regulate nervous system.
Helps regulate muscle system. May be essential for growth of infants, children, adolescents. Single amino-acid deficiencies are unknown except in people on crash diets consisting of only one or a few foods. Amino-acid deficiencies appear more commonly as a result of total protein deficiency, which is rare in the United States and Canada. Anyone with inadequate caloric or nutritional dietary intake or increased nutritional requirements.