Aspartic acid is an alpha-amino acid. L-Aspartic acid can be directly incorporated into proteins. D-aspartic acid has a more limited biological effect. DL-aspartic acid, known as a racemic mixture.
Aspartic acid is present in all organisms, from bacteria to plants to animals. Foods high in aspartate include oysters, lunch meat, sausage meat, game, sprouted seeds, oatmeal, avocado, asparagus, tender sugar cane, and beet molasses.
It is classified as an acidic, charged aliphatic amino acid. In humans, aspartic acid is a non-essential amino acid extracted from glutamic acid by enzymes that use vitamin B6.
Magnesium and zinc may be natural inhibitors of some of the effects of aspartate. When chemically coupled to the amino acid D-phenylalanine, aspartic acid is part of the natural sweetener aspartame.