L-Tryptophan

An amino acid that functions as a precursor of serotonin, the relaxing neurotransmitter. Aids relaxation and sleep. This tryptophan is safe, backed by an FDA master file. Exceeds all international pharmaceutical standards, including US, Japanese, and European. Tested for heavy metals, solvents, and micarobilogical contaminants. Guaranteed the finest tryptophan in the world. (120 capsules)