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Tryptophan

WHAT IS TRYPTOPHAN?
Tryptophan is one of eight essential amino acids – essential means the body can’t produce Tryptophan itself and it must be obtained via the diet. Tryptophan is best known for being a precursor of both Serotonin and Melatonin.
Tryptophan can be found in foods such as meat, fish and dairy.
BULK POWDERS Tryptophan is comprised of 100% Tryptophan powder.  A quick check of the Certificate of Analysis (COA) on this product page (to the side of the product image)