Uses:
Nutritional supplements. antioxidant. Tryptophan, the precursor of serotonin, an important neurotransmitter in humans, is one of the essential amino acids in the body. L-tryptophan is an essential amino acid that cannot be
synthesized by the human body. Food industry is mainly used as a food nutritional supplement. Pharmacopoeial grade L-threonine is used in the formulation of complex amino acid infusions and amino acid preparations.