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The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and the sleep-wake cycle. It also supports immune functions and can be converted to vitamin B-3, necessary for many bodily processes. Source Naturals® L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.*
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🇺🇸 Ship from USA · On Agora since 2026
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