A metabolism-boosting hormone may offer a powerful new alternative to GLP-1 weight-loss drugs by rewiring the brain’s energy-burning circuits. Credit: Shutterstock Scientists have discovered how a naturally occurring hormone can reverse obesity in mice, and the answer lies in the brain. Researchers at the University of Oklahoma found that the hormone works by sending signals to a brain region that helps control metabolism and appetite. This is the same general area targeted by widely used GLP-1