<s>[INST] Given an abstract text, please determine whether it contains any drug mentions. Provide a 'Yes' or 'No' answer based on the presence or absence of drugs. Abstract Text: Melatonin Improves Gut Dysbiosis In High Fat-High Fructose Diet Model Of Nafld And/Or Photoperiod Induced Chronodisruption In C57Bl/6J Mice[/INST] Yes</s>