• Tryptophan




    Tryptophan is an essential amino acid with an aromatic side chain. It is both, a glycogenic and a ketogenic amino acid


    Sources of tryptophan

    Best sources of tryptophan are soybeans, salmon and lamb. Vension and chicken are also rich in tryptophan


    Functions of tryptophan

    Tryptophan is needed for making Niacin (Vitamin B3). Around 3% of tryptophan is used to make it. Tryptophan is also a precursor of Serotonin, a neurotransmitter, which is used in pain perception, regulation of sleep, appetite, temperature and mood.


    Health Conditions

    Tryptophan plays a role in the prevention and/or treatment of the following health conditions:







    Obsessive/compulsive disorder


    Premenstrual syndrome

    Senile dementia

    Tourette's syndrome


    Clinical disorder regarding tryptophan: Hartnup Disease


    Hartnup disease is a genetic disorder that decreases the level of transport proteins for transporting certain amino acids, especially tryptophan. Symptoms include mental retardation, pallegra and photosensitivity. Treatment includes decreased exposure to sunlight and increased protein intake with Niacin supplements


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