Recent findings indicate that widely used weight-loss medications might lead to muscle loss, including vital heart muscle, potentially leading to serious health complications over time. Experts call for more research and a cautious approach to using these drugs,

The new treatment targets gut hormone GLP-1 but also mimics amylin, a hormone released by the pancreas that suppresses hunger.

Some outcomes, like reduced risk of cardiovascular disease and increased chance of nausea, were expected. But others took researchers by surprise.