food contains melatonin
3. Foods containing melatonin. Melatonin is a hormone made by a small gland in the brain. Melatonin helps control your sleep and wake cycles. Very small amounts of it are found in foods such as banana, corn, rice, tomatoes, almonds, seeds and oats.You can also buy it as a supplement.. Foods containing melatonin. Melatonin is a hormone made by a small gland in the brain. Melatonin helps control your sleep and wake cycles. Very small amounts of it are found in foods such as banana, corn, rice, tomatoes, almonds, seeds and oats.