The Last 10 Pounds: Should You Use a GLP-1 for Cutting?

By Dr. Farhan Abdullah, DO | Medical Director, Magnolia Functional Wellness | Southlake, TX

A guy walked into my office this spring, athletic build, probably already sitting around 12 percent body fat, and asked me to start him on tirzepatide. He wanted to drop "the last ten pounds" before a beach trip. He wasn't overweight. He wasn't close. He just wanted his abs a little sharper, and he'd heard these medications strip fat off you while you sleep. So I asked him a question that stopped him cold. Do you want to lose ten pounds, or do you want to lose ten pounds of fat? Because those are not the same thing, and the medication doesn't know the difference.

That conversation happens more and more. I'm Dr. Farhan Abdullah, and at Magnolia Functional Wellness here in Southlake, we run a serious medical weight loss program. We prescribe GLP-1s and dual agonists every day, and I've watched them turn the corner for people fighting real metabolic disease. But lately the question isn't coming from people with obesity. It's coming from lean and lean-ish folks who want to use these drugs the way a bodybuilder runs a "cut," peeling off the final stubborn layer to reveal the muscle underneath. That's a very different use case, and it comes with some catches most people never think about.

So let's talk about it straight. Can you use a GLP-1 for cutting? Technically, sure. Should you? That depends on a handful of things almost nobody considers before they fill the prescription.

What "Cutting" Actually Means, and Why Everyone's Asking About GLP-1s

"Cutting" is borrowed straight from the bodybuilding world. The whole point of a cut is to lose body fat while holding onto as much muscle as humanly possible. You're not chasing a number on the scale. You're chasing a ratio. Less fat, same muscle, sharper definition, and ideally a metabolism that doesn't crater in the process. A good cut is slow, deliberate, and protective of the lean tissue you worked years to build.

Now look at what a GLP-1 medication was actually designed to do. Semaglutide, tirzepatide, and the rest were built and tested in people with obesity and type 2 diabetes, where the goal is large total weight loss to reverse metabolic damage. They work by quieting appetite and slowing gastric emptying. That "food noise" that runs in the background of so many people's heads, the constant low hum of what's-in-the-pantry, gets turned way down. For someone who genuinely struggles to maintain a calorie deficit, that's enormously helpful. The deficit becomes almost effortless.

And that's exactly the appeal for the cutting crowd. Anyone who's ever dieted down to single-digit body fat will tell you the hardest part isn't the gym. It's the hunger. It's saying no to the bread basket at dinner in Southlake Town Square when everyone else is digging in. It's white-knuckling through evening cravings. A GLP-1 makes that part disappear, and that feels like a cheat code.

Here's where I push back, though. The drug doesn't create a "smart" deficit. It just creates a deficit. It lowers how much you eat, full stop. It has no idea you're trying to preserve your deltoids. The appetite suppression is the same whether you're 320 pounds with sleep apnea or 175 pounds chasing a six-pack. The body's response to a calorie deficit, on the other hand, changes a lot depending on how lean you already are. And that's the part that turns a casual "last ten pounds" plan into something that can actually work against you.

The Catch Nobody Mentions: The Scale Won't Tell You What You Lost

Every pound you lose is some mix of fat and lean tissue. Always. There's no diet, drug, or protocol that burns pure fat and nothing else. The only question is the ratio, and that ratio is the entire ballgame when you're cutting.

We have real data on this now. A 2025 analysis of the SURMOUNT-1 tirzepatide trial, published in Diabetes, Obesity and Metabolism by Look and colleagues, used DEXA scans to measure exactly what people were losing. Of the total body weight lost on tirzepatide, roughly 75 percent was fat and about 25 percent was lean mass. You can read the SURMOUNT-1 body composition analysis here. Now, a quarter of your weight loss coming from lean tissue isn't a disaster for someone with a lot of fat to lose. They've got plenty of fat to give, and the lean loss is partly the structural tissue your body sheds when it's no longer hauling around extra weight. But flip it around. If you only have ten pounds to lose and a chunk of that is muscle, you may finish lighter and somehow softer. Smaller, not sharper. That's the opposite of a cut.

It gets trickier the leaner you are. When body fat is already low, the body fights harder to protect its remaining fat and becomes more willing to break down muscle for fuel. So the very people most interested in "cutting," the already-fit ones, are the people whose lean mass is most at risk during aggressive, appetite-suppressed weight loss. Across the broader semaglutide and tirzepatide literature, the fraction of weight lost as lean tissue has ranged from roughly a quarter up to nearly half, depending on the population, the dose, and how it was measured. Without a deliberate plan to protect muscle, the GLP-1 is happy to let it go.

This is why I get a little frustrated when these drugs get marketed as "fat loss" medications. They're weight loss medications. There's a difference, and that difference is muscle. Muscle is your metabolic engine, your insulin sink, your protection against frailty as you age. Trading it away to see your abs for one summer is a genuinely bad deal, and most people make that trade without ever knowing they made it, because the bathroom scale only tells them they got lighter.

Is the Last Ten Pounds Even a Job for a GLP-1?

Let's zoom out, because I think the body composition question is downstream of a bigger one. Is a powerful metabolic drug the right tool for a cosmetic goal in someone who's already healthy?

Start with the basics. These medications are FDA approved for obesity and for overweight with a weight-related condition. Using one in a lean person for the last few vanity pounds is off-label, and off-label isn't automatically wrong, physicians do it thoughtfully all the time, but it shifts the risk-benefit math. When someone with obesity loses weight, the health upside is huge and easily justifies the side effects. When a 175-pound guy with a normal metabolic panel takes the same drug to lose ten pounds, the health upside is close to zero, while the side effects, nausea, fatigue, GI misery, and the muscle concern we just covered, are all still on the table. You're paying full price for a fraction of the benefit.

Then there's the rebound problem. GLP-1s don't rewrite your set point. The appetite suppression lasts as long as the drug does. When a lean person stops, appetite roars back, and because they may have lost muscle, their resting metabolism can be lower than before they started. That's a setup for regaining fat and landing at a worse body composition than the starting point. I've seen people end a short "cut" puffier than when they began, which is a brutal irony.

I'd be doing you a disservice if I skipped the visible stuff too. Rapid loss in a lean face produces what people call "Ozempic face," that deflated, gaunt look that comes from losing the fat pads that keep a face looking youthful. On someone with a fuller face, that change can be flattering. On someone already lean, it can age them ten years. And honestly, there's a supply and ethics layer here that I think about as a physician. When access is tight, I'm not eager to hand a scarce metabolic medication to someone chasing aesthetics over someone with diabetes who needs it.

None of this means lean people can never benefit. There's a real category of person who is "skinny fat," normal weight but metabolically unhealthy, with poor muscle and stubborn visceral fat, and that's a legitimate conversation. If you're genuinely in that bucket, our physician-supervised GLP-1 program is built to sort that out with actual data instead of guesswork. But "I want my abs back for a wedding" is not the same as "my metabolism is in trouble," and I owe my patients the honesty to say so.

If You're Going to Do It, Here's How to Do It Intelligently

Let's say we've talked it through, you understand the trade-offs, and there's a reasonable case to move forward. Maybe you've stalled on a cut, the appetite is unmanageable, and you want help getting over the line. Fine. Then we do it in a way that protects what matters. There's a smart version of this, and it looks nothing like just taking the shot and hoping.

Resistance training is non-negotiable. This is the single biggest lever. The body keeps the muscle you actively use and discards what it sees as metabolically expensive and unnecessary. If you're lifting hard three or four times a week, you're sending a loud signal to hang onto that tissue. The evidence here is genuinely encouraging. In a 2021 New England Journal of Medicine trial by Lundgren and colleagues, people who combined a GLP-1 (liraglutide) with a structured exercise program saw their body-fat percentage drop about twice as much as either approach alone, and crucially, the exercising groups protected their lean mass while the fat came off. You can read the exercise plus GLP-1 trial here. The drug handles the appetite, the training handles the muscle. Neither does the other's job.

Protein comes next. When you're in a deficit on an appetite suppressant, it's frighteningly easy to undereat protein, because you're just not hungry. I push patients toward roughly 0.7 to 1 gram of protein per pound of goal body weight, and I make them track it for a while, because almost everyone underestimates. Creatine, adequate sleep, and not crashing the deficit too fast all help too.

Dosing strategy matters more than people think. For a cut in a leaner person, you often don't want the big obesity-level doses. Lower or microdosing approaches can quiet appetite enough to maintain a modest deficit without the sledgehammer effect that drives excessive lean loss. We also keep these courses short and defined, with a clear off-ramp and a maintenance plan, rather than open-ended. And we monitor. Lab work, body composition where possible, not just the scale. If you're curious about how the dual-agonist option fits in, here's more on tirzepatide and how we use it. Done this way, with the lifting, the protein, and a thoughtful dose, a GLP-1 can be a reasonable short-term assist instead of a muscle-wasting shortcut.

What I Tell My Patients in Southlake

Here's my honest position. For the last ten pounds in someone who's already lean and healthy, a GLP-1 is usually the wrong first move. Not because it can't make the scale go down, it absolutely can, but because the thing it does well, blunt appetite, isn't really your problem, and the thing you actually want, fat loss with muscle retention, isn't what it's built to deliver on its own. Most of the time, the real fix is more boring and more durable: dial in protein, lift with intent, fix your sleep, be patient. That combination outperforms a quick chemical cut almost every time, and it doesn't cost you muscle.

That said, I'm not an absolutist about it. Medicine lives in the gray. There are leaner patients with genuine metabolic dysfunction, brutal appetite dysregulation, or a long history of failed cuts where a carefully dosed, closely monitored, short course alongside a real training and nutrition plan makes sense. The difference is the plan and the supervision, not the molecule. A GLP-1 in a vacuum, with no lifting, no protein target, and no exit strategy, is how you end up smaller and softer with a slower metabolism. A GLP-1 inside a structured plan is a tool, and tools are fine when they fit the job.

So before you chase the last ten pounds with a prescription, ask yourself what you're really after. If it's a number, the drug will get you there and you may not like what's left. If it's a leaner, stronger, more defined body that holds up over time, that takes a strategy, and the medication is at most one piece of it. If you want help figuring out which camp you're in, that's the kind of conversation we have every day at Magnolia Functional Wellness right here in Southlake. Bring your goals, and I'll give you the same straight answer I'd give a friend.