Weight loss surgery eligibility criteria broadened with new guidelines.

New guidelines have expanded the number of people eligible for weight loss surgery, as evidence shows it can improve all obesity-related health problems, including heart disease, stroke, cancer, and type 2 diabetes. The previous requirement of a body mass index (BMI) of 40 or higher has been lowered, as the surgery has become safer and more effective. However, it is still major surgery and requires a permanent lifestyle change, so patients should consider it carefully with their doctor.