Vital Sleep is uniquely formulated to enhance sleep in multiple ways. L-Theanine and Ashwagandha help calm the mind and reduce cortisol. Melatonin is a key neurotransmitter that tells the brain that it is time to sleep. Lemon Balm, Passion Flower and Skullcap are all calming to the nervous system. 5-HTP helps improve serotonin levels.