You’ve probably heard of Ozempic or Wegovy. These are the injectable drugs that have become household names for weight loss and diabetes. Now, researchers are investigating whether these medications known as GLP-1 agonists or GLP-1 drugs could treat everything from cancer and brain disease to depression, addiction and endometriosis. Some findings are genuinely exciting. Others are being oversold. Here’s what the science actually says. First, how do these drugs work?