Melatonin, a hormone that regulates sleep-wake cycles, has gained significant popularity as a dietary supplemennfh magnesium glycinatet for improving sleep quality and managing circadian rhythm dinature’s way chelated zincsorders. The regulatory stamagnesium taurate and glycinate supplementtus of melatonin varies magnesium citrate on empty stomachwidely across the globe, reflecting differences in public health policies, scientific assessments of safety and efficacy, and cultural attitudes towards supplements. This article explores the regulatory frameworks governing the use of melatonin in major health supplement markets, includcan magnesium glycinate cause diarrheaing the United States, the European Union, Canada, Australia, China, Japan, and Singapore.