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The essential amino acid L-tryptophan is the precursor for the synthesis of melatonin and serotonin, a hormone and a neurotransmitter involved with mood and stress response. It helps support relaxation, restful sleep, and a positive outlook. This tryptophan tablet includes vitamin B-6, which is required to convert tryptophan to serotonin. If needed, L-tryptophan is converted to niacin in the body, an important B vitamin. 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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