L-tryptophan is an essential amino acid (protein building block) in human nutrition. Essential amino acids are not synthesized by the body and must be obtained in the diet.
The L-tryptophan in this product is manufactured and tested for purity according to the United States Pharmacopeia (USP) standards.
Take 1 or 2 capsules daily, or as directed by a health practitioner.
For optimum absorption, take separately from protein-containing foods and dietary supplements containing protein or amino acids.