Swanson L-tryptophan, 500 Mg, 90 Veggie Capsules

500 mg Per CapsuleSleep SupportFrom TryptoPure®Dietary SupplementAjipure® Amino AcidEncourages Healthy Sleep PatternsPromotes Normal Serotonin LevelsPromotes a Feeling of Calmness and RelaxationScience-Backed Quality Since 1969It's back, and better than ever! L-Tryptophan is a precursor to serotonin, and it's powerfully effective when used properly. By supporting serotonin levels, L-tryptophan not only helps us fall asleep and stay asleep, but it also promotes mental health and provides dietary support against nervousness and tension. TryptoPure L-Tryptophan from Swanson Ultra is the purest pharmaceutical-grade tryptophan on the world market. It's produced through a fermentation process from a vegetarian source, using the most precise standards for safety and quality assurance.