Tryptophan is a natural building block of serotonin?? the neurotransmitter that plays an important role in appetite?? mood?? normal sleep patterns?? and nervous-system function</br>No better?? no more-natural way to feel relaxed</br>May reduce appetite (cravings) for carbohydrates</br></br>Product Description</br></br>L-tryptophan complete is a unique formulation designed to maximize healthy levels of serotonin in the brain.</br><br/>http://www.amazon.com/gp/product/B001E56G5S