L-tryptophan is an essential amino acid and must be obtained from food or supplements. L-tryptophan is metabolized to serotonin (5-hydroxytryptamine) and melatonin, which is important for relaxation, restful sleep and positive mood.*
Calcium phosphate, cellulose, stearic acid (vegetable source), silicon dioxide, magnesium stearate (vegetable source) and a food-grade coating.
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