Tryptophan is an amino acid that is known for its benefits for health and wellbeing. One of its health benefits is the production of melatonin that helps us sleep better. To incorporate tryptophan in your diet, use the Zenbev supplements and drinks that contain tryptophan derived from pumpkin seeds. Zenbev is a powdered drink that works differently during the day and the night. At night it induces the production of melatonin that lets you sleep peacefully and during the day it stimulates the production of natural serotonin. This powdered drink can easily be mixed with the beverage of your choice. Use the Zenbev Coupon & Promo Code.