Buy Isotonix® L-TryptophanIsotonix® L-Tryptophan is an isotonic version of the essential amino acid, l-tryptophan.  L-Tryptophan is an essential amino acid that helps maintain healthy levels of serotonin in the brain.  Serotonin helps regulate mood.  Isotonix® L-Tryptophan provides maximum results by combining itself with niacin and Vitamin B6, members of the B vitamin family, which promote normal absorption of L-tryptophan.  By supplementing with Isotonix® L-Tryptophan, healthy levels of serotonin in the brain will help enhance mood and support sleep.*

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