Ingredient Description

As an amino acid, L-tryptophan comes from the protein-containing foods you eat. Your body uses it to build the new proteins it needs. Beyond this vital job, tryptophan has other roles. After it gains entry to your brain, it's converted into the neurotransmitter serotonin. As a neurotransmitter, serotonin has a role in learning and memory. It also regulates appetite and mood. Low levels of serotonin can cause depression. After tryptophan is converted into serotonin, your body uses serotonin to produce the hormone melatonin. In this way, tryptophan helps regulate your sleep-wake cycle, because melatonin promotes sleep.