Note
Clarification: Pesach Guides including Star-K/Rabbi Bess Lists, indicate that NatureMade Melatonin is chometz free. Please note that this refers only to NatureMade Melatonin Swallow Tablets. Naturemade also makes a product called “VitaMelts Sleep†made with melatonin. The VitaMelts Sleep contains chometz and should not be used on Pesach.