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Unique combination of four nutrients proven to support stress, relaxation and sleep Professional strength blend of L-Tryptophan, L-Theanine, plus Vitamins B6 and B3. L-Tryptophan Precursor of the feelgood neurotransmitter serotonin, and sleep-inducing melatonin, helps promote feelings of calm, relaxation, and sleepiness. L-Theanine  Found...