Daily MailThe 'exercise hormone' really DOES exist: Irisin 'triggers weight loss ...Daily MailA fat-burning hormone, which is released in the body during exercise, is 'not a myth', scientists have said. There had been doubt as to whether or not Irisin, a hormone discovered by US scientists in 2012, does is a reality. But a new study has found ...và hơn thế nữa »