Melatonin + elderberry, zinc, vitamins C & D. Supports revitalizing sleep. Supports immune health. No. 1 drug free sleep aid brand (Nielsen x AOC, 52 weeks ending 09/11/21). Helps you get revitalizing sleep that is essential for a healthy immune system. What's Inside: Melatonin: for better sleep. Elderberry Extract: known for its antioxidant benefit. Immune Blend: powerful blend of zinc, vitamins C & D. A powerful blend to help you wake up refreshed. Natrol Sleep + Immune Health capsules: No artificial flavors, sweeteners or preservatives.