How It Works Serotonin has been linked to positive mood and healthy emotional balance. But you can’t just take a serotonin supplement and call it a day. Serotonin cannot cross the all-important blood-brain barrier. Serotonin has to be produced by the body in order for you to benefit from it. One of the best ways to do this is to supplement with serotonin’s building blocks. The natural production of serotonin begins with the common amino acid L-Tryptophan. L-Tryptophan converts to 5-HTP which is the direct precursor of this essential neurotransmitter (5-HT). Provaxal contains both L-Tryptophan and 5-HTP, creating a time release effect that when combined with the B-vitamins included, to assist the body in generating serotonin.
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