Melatonin 10mg with L-Theanine - 45 TabletsSundance Vitamins Extra Strength Melatonin is great for when you want to settle down for the night. These tablets provide you with 10 mg of Melatonin per serving, as well as 5. 5 mg of L Theanine, an amino acid. Melatonin is a hormone that is naturally produced by our bodies as a response to darkness. As adults get older, Melatonin levels may start to decline, and a supplement may need to be taken. This extra strength formula from Sundance Vitamins is