GLP-1 Medications vs. Weight Loss Surgery: What a New “Real-World” Study Means for Patients

GLP-1 medications like semaglutide and tirzepatide have helped many people jumpstart weight loss and improve health. With all the attention around these medications, it’s understandable that patients ask a big question: Which works better long term—GLP-1s or weight loss surgery?

A new “real-world” study presented at the American Society for Metabolic and Bariatric Surgery compared outcomes for people using GLP-1 medications versus those who had bariatric surgery (such as sleeve gastrectomy or gastric bypass). The key takeaway: for patients eligible for both options, bariatric surgery produced significantly greater and more durable weight loss over time.

We asked Dr. Mark Colquitt at Foothills Weight Loss Surgeons in Knoxville, TN, what he thinks about the study and as Dr. Colquitt put it, “We’ve always known that surgery is the most effective, durable… It works. It’s long lasting, and it shouldn’t be ignored.”

Why “Real-World” Results Can Look Different Than Clinical Trials

Clinical trials happen in controlled settings with close follow-up and support. In real life, many people don’t stay on GLP-1 medications consistently over the long term, and that can change outcomes.

Dr. Colquitt explains that when researchers started looking at real-world use, “they started to look at patients’ use of those medications over time, [and] they tend to stop it.” Some patients discontinue due to side effects, affordability, changes in insurance coverage, access issues, or the understandable belief that they can stop once they reach a goal.

That’s why this study is getting attention: “There’s a big discrepancy between what’s being published… and what reality is,” Dr. Colquitt says.

And the practical consequence is important for patients to understand: “They stop the medications and then they gain weight back… the yo-yo back and forth,” he notes.

The Biggest Takeaway: Surgery Delivers the Most Durable Weight Loss

It’s important to say this clearly: GLP-1 medications can be very helpful for the right patient. But for patients who qualify and want the strongest long-term option, weight loss surgery remains the most effective and durable solution.

One reason is that surgery isn’t something you “stop.” It’s a one-time intervention that continues working over time. Dr. Colquitt explains it this way: “It’s a one-time… effect,” and it offers a longer-lasting foundation than on-and-off medication use for many patients.

Just as important, Dr. Colquitt emphasizes that surgery shouldn’t automatically be framed as a last resort: “We need to stop framing surgery as a last resort… surgery treats obesity more effectively than any other option.” For many patients, it can also improve obesity-related conditions such as type 2 diabetes and heart disease, benefits that go well beyond the scale.

Medications Aren’t “Bad”—They’re Part of the Toolbox

This isn’t an “either/or” conversation. At Foothills Weight Loss Surgeons, we treat obesity as a chronic disease, and treatment should be individualized.

Dr. Colquitt is clear on this point: “We’re not saying that medication is bad.” In fact, for many patients, a combination approach can be the best strategy.

As he describes, sometimes a patient starts with surgery and later benefits from medical weight management to help reach or maintain goals: “We combine them together. So it’s a two-pronged attack on obesity instead of just surgery by itself.”

This is also why it matters to work with a team that can offer both paths—so you’re not forced into a one-size-fits-all plan.

What About Safety?

Modern bariatric surgery has advanced dramatically. Dr. Colquitt emphasizes that today’s procedures are not only effective—they’re also very safe when performed by experienced teams with appropriate follow-up.

In his words: “Surgery is safe… Most of my patients are outpatient. They go home same day.” Like any medical treatment, surgery comes with risks and requires long-term nutrition and vitamin monitoring—but with proper guidance, it is considered a safe and reliable option for many patients.

The Bottom Line: Choose the Path That Fits You

GLP-1 medications and bariatric surgery are not enemies—they’re tools. GLP-1s can be a powerful option for the right patient. But for patients who qualify and want the most effective, long-lasting weight-loss solution, weight loss surgery remains the gold standard, and it can be even more successful when combined with appropriate medical weight management.

If you’re unsure which path fits your health goals, the best next step is a consultation with a team that offers both options—so your plan is built around you, not a trend.

 Contact Foothills Weight Loss Surgeons online or call (865) 984-3413 to discuss the best weight loss plan for you.