Nature's Way Sambucus NightTime is a Standardized black elderberry with melatonin & herbs for restful sleep. For centuries the dark berries of European black elder (Sambucus nigra L.) have been traditionally used as a winter remedy for immune support. Melatonin is a common solution to help you fall and stay asleep, as it promotes a quality, restful night. Nature's Way herbal extract blend of lemon balm and passionflower have been traditionally used to promote relaxation. Made with a unique, full-spectrum black elderberry extract, ensuring Flavonoid BioActives content, which has been tested for activity within the body. Elderberry extract is made with a gentle, solvent-free extraction method that ensures maximum flavonoid potency.