High Quality Pure D-Tryptophan

Additional Info
Transportation: Ocean,AirPlace of Origin: China
Product Description
Tryptophan is one of the 22 standard amino acids and an essential amino acid in the human diet. It is needed to prevent illness or death, and it therefore must be part of their diet.

Tryptophan is sold as a dietary supplement for use as an antidepressant, anxiolytic, and sleep aid.
In addition, tryptophan functions as a biochemical precursor for serotonin, niacin and auxin.
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High Quality Pure D-Tryptophan