Why Bariatric Surgery Beats Weight-Loss Medications for Long-Term Success

If you’ve been thinking about ways to lose weight and improve your health, you’ve probably heard a lot about popular medications like semaglutide and tirzepatide (brand names such as Ozempic®, Wegovy®, and Mounjaro®). These drugs can help some people lose weight, but new research shows they don’t come close to the long-term results of bariatric surgery.

In a study of more than 50,000 patients from NYU Langone Health and NYC Health + Hospitals, people who had bariatric surgery – such as gastric sleeve or gastric bypass – lost nearly five times more weight than those who only used GLP-1 medications.

Here’s what the researchers found after two years:

• Gastric sleeve patients lost about 23% of their total body weight.
• Gastric bypass patients lost about 25% of their total body weight.
• Patients on medications alone lost only 5–9% of their total body weight – and only if they stayed on the drugs for at least a year.

“These results reinforce what we’ve known for decades – bariatric surgery is not only safe, but it is by far the most effective tool for long-term weight loss and improvement in obesity-related diseases,” explained Dr. Alexander Abkin, a bariatric surgeon in New Jersey. “Surgery works by resetting your metabolism and reducing hunger hormones, which makes it much easier to keep the weight off. No pill can do that.”

Another challenge with weight-loss medications is that they must be taken long-term to maintain results—and they can cost more than $1,000 a month. If you stop taking them, the weight often comes back. Bariatric surgery, on the other hand, is a one-time treatment that is usually covered by insurance.

“It’s not just about the number on the scale,” said Dr. Abkin. “We see patients’ diabetes improve or go into remission, blood pressure come down, sleep apnea resolve, and overall quality of life improve dramatically after surgery. These are changes that medications alone just can’t match.”

The good news is that bariatric surgery today is safer and less invasive than ever before. Most procedures are done laparoscopically, which means small incisions, faster recovery, and lasting results backed by decades of research.

For anyone considering their options, Dr. Abkin has this advice – “If you want to lose a little weight for a short period, medications may help. But if you want lasting weight loss and a real improvement in your health, surgery is the most effective tool we have. It’s a life-changing investment in your future.”