Nature's Bounty Sleep3 is a triple action, 100% drug-free sleep aid. Each tablet leverages time-release technology to dissolve each layer at different times throughout the night to help you relax and get a good night's sleep so you can wake up ready to take one the day. Melatonin plays a vital role in the maintenance of circadian rhythm "Sleep-wake cycle", sleep induction and sleep duration. L-Theanine interacts with the neurotransmitter GABA, to support a calm and relaxed mood. Our proprietary Nighttime Herbal Blend includes Chamomile, Lavender, Lemon Balm and Valerian Root extracts.