Pure Encapsulations - 5-HTP (5-Hydroxytryptophan) 100 mg - Hypoallergenic Dietary Supplement to Promote Serotonin Synthesis* - 60 Capsules by Pure Encapsulations at Maximum Wellness. MPN: HYD16. Hurry! Limited time offer. Offer valid only while supplies last. 5-Hydroxytryptophan (5-HTP) is an intermediate in the natural synthesis of the essential amino acid, tryptophan, to serotonin. The enzyme tryptophan hydroxylase adds a hydroxyl group (OH) to tryptophan, forming the 5-HTP intermediate. In the body, it converts to serotonin with the removal of a carboxyl group (COOH) by a second enzyme. Serotonin is an important neurotransmitter involved in the regulation of endocrine and brain activity responsible for emotion, appetite and sleep/wake cycles. In
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