Found in sugar cane and sugar beet molasses and proteins/peptides. Dietary supplement, nutrient Aspartic acid (abbreviated as Asp or D; Asx or B represent either aspartic acid or asparagine) is an alpha-amino acid with the chemical formula HOOCCH(NH2)CH2COOH. The carboxylate anion, salt, or ester of aspartic acid is known as aspartate. The L-isomer of aspartate is one of the 20 proteinogenic amino acids, i.e., the building blocks of proteins. Its codons are GAU and GAC. (Wikipedia)