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Profile:Manufacturer - Producer|Ref:PSL101108YH | Country: China | Currency: | Export: No
L-Tryptophan is one of essential amino acids in animal and human diet; it’s needed for normal growth in infants and for nitrogen balance in adults. The body uses tryptophan to help make niacin and serotonin. Serotonin is thought to produce healthy sleep and a stable mood.
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