L-Aspartic acid is a non-essential amino acid that plays a crucial role in the urea cycle, helping to remove ammonia from the body. It serves as a precursor for other amino acids including asparagine, arginine, and lysine. Aspartic acid is involved in energy production and plays a role in the synthesis of purines and pyrimidines. It also serves as a neurotransmitter in the central nervous system and is important for brain function.