Watch out, Ozempic. Stanford Medicine scientists have discovered a naturally occurring molecule that rivals the weight-loss effects of semaglutide-based GLP-1s in animals — without the dreaded side effects. “Nothing we’ve tested before has compared to semaglutide’s ability to decrease appetite and body weight,” said Dr. Katrin Svensson, senior author of the research and an assistant professor of pathology at Stanford. “We are very eager to learn…