L-Tryptophan is an essential amino acid important in human nutrition for the synthesis of melatonin and serotonin, hormones regulating sleep, positive mood and immune function.


As an essential amino acid, it is not synthesized by the body and must be obtained from the diet.


L-Tryptophan is important for the development and functioning of many organs in the body. After absorbing L-tryptophan from food, our bodies convert it to 5-HTP (5-hyrdoxytryptophan), and then to serotonin. Serotonin is a hormone that transmits signals between nerve cells. It also causes blood vessels to narrow. Changes in the level of serotonin in the brain can alter mood.



  • Amino Acids
  • Animal Health
  • Mood Health
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