OverviewAmino acids are either "essential", which must be supplied by food, or "nonessential", which are made in the body.
Review Date 1/13/2018
Updated by: Emily Wax, RD, The Brooklyn Hospital Center, Brooklyn, NY. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.