L-Tryptophan is an amino acid that is a precursor to many hormones and neurotransmitters in the human body. Its most popular use is in the production of serotonin and melatonin, which help regulate mood.* L-Tryptophan is an essential amino acid that is famous for its high levels in turkey. It is used in the biosynthesis of proteins and is found in meats, especially poultry. It is also used as one of the serotonin and dopamine supplements, which aid in promoting general feelings of happiness and motivation.* L-Tryptophan may also promote a calm mood, aid memory.* In addition, L-Tryptophan is both powder and capsule forms. Both does not contain any fillers and additives. Our gelatin capsule is available in 100 & 300 counts.