Despite reports questioning the role of the hormone irisin (and indeed, its very existence), Harvard Medical School’s Bruce Spiegelman and his colleagues today (August 13) provide fresh evidence ...

Exercise helps beef up bones, but exactly how hasn’t been clear. A study published today (December 13) in Cell points to irisin, dubbed the “exercise hormone,” as a messenger between muscle and bone ...

Could irisin, a newly discovered and little-known hormone, impact our metabolism? Stylist investigates. More and more people are starting to have conversations about the link between our workout ...