Former FDA chief Dr. David Kessler says the new weight-loss drugs are a powerful tool to fight obesity. But they come with pitfalls. Here's his tips for how to use them successfully.

Taking the drug made one writer feel so sick she quit and focused on healthy habits instead of her body size. Turns out, 65% of people using GLP-1 drugs for weight loss quit within a year.

A telehealth company partnered with a pharmacy that lacked a required license, raising doubts about the safety and efficacy of the weight-loss medicines it mailed to patients.

Several new studies find promising evidence that the GLP-1 class of drugs may have a cancer-preventive effect, especially for cancers linked to obesity.

Popular weight-loss drugs mimic GLP-1, a hormone the body makes naturally after eating. Turns out some foods trigger GLP-1 better than others, making us feel full and eat less.