Tryptophan (L-Tryptophan)

Tryptophan, or L-Tryptophan, is an essential amino acid that the human body cannot synthesise in sufficient amounts and therefore must obtain through the diet. Tryptophan is also one of the amino acids used by the body to build proteins.

L-Tryptophan participates in several biochemical processes and acts as a precursor in the biosynthesis of serotonin and melatonin. In sports nutrition, tryptophan is commonly available as a standalone amino acid in powder, capsule and other forms.

Explore other individual amino acids including leucine, tyrosine and the complete amino acid range. You can also browse protein and other food supplements.