This is an amino acid that promotes uptake of trace elements and is intricately involved with the energy cycle of the body, linking two of the body's most important biochemical pathways, the Urea cycle (the foundation of nitrogen metabolism) and the Krebs Cycle (the body's pathways for metabolism of carbohydrate). Aspartic acid in its "L-" form, L-Aspartic acid, is a major excitatory transmitter in the Human brain, and is the precursor of acetylaspartic acid, the most highly concentrated amino acid neurotransmitter in the brain. Aspartic acid, as well, is involved in the building of DNA and orotates. Aspartic acid and Phenylalanine are the amino acids which make up Aspartame, the new artificially derived "amino acid," which is now used commonly as a sweetener.

