Xenadrine Sleep Plus provides the amino acid L-Tryptophan and the natural peptide melatonin; both of which have been shown in research to help promote a restful night’s sleep. In addition, Xenadrine Sleep Plus contains a blend of key nutrients and botanicals which have been shown in research to support healthy body weight. To receive the desired weight loss benefits of Xenadrine Sleep Plus, it should be used in conjunction with a well-balanced, calorie-controlled diet and exercise program.