GLP-1 weight loss medications have completely changed the conversation around losing weight. Drugs such as semaglutide and newer incretin-based medications can produce significant results and can be extremely valuable for the right person.
But there’s something I think gets lost in all the attention surrounding these medications:
Losing weight and improving your health aren’t always the same thing.
GLP-1 medications can help control appetite and make eating less much easier. What they cannot do is automatically build muscle, improve food choices, create an exercise routine or change the habits that contributed to weight gain in the first place.
That’s why I don’t look at GLP-1s as either “good” or “bad.” I look at them as a tool—and like any tool, how you use it matters.
These medications aren’t designed simply for someone who wants to quickly lose 10 or 15 pounds before vacation.
For example, FDA-approved Wegovy is indicated for long-term weight management in adults with obesity and certain adults who are overweight with at least one weight-related medical condition. It’s intended to be combined with reduced-calorie nutrition and increased physical activity.
You can read the FDA prescribing information for Wegovy for its approved uses, contraindications, warnings and side effects.
That’s an important part people sometimes overlook:
The medication was never intended to replace lifestyle changes.
People considering GLP-1 weight loss medications should discuss their health history, goals, risks and alternatives with a qualified medical provider.
From a fitness standpoint, this is one of the areas that concerns me most.
When you lose a significant amount of body weight, you don’t necessarily lose only body fat. Some lean tissue can also be lost.
Research examining GLP-1 and incretin-based weight-loss medications has found that a portion of the weight lost can come from lean mass. However, lean mass isn’t exactly the same thing as skeletal muscle, and lean-mass loss can also occur with other forms of significant weight loss.
The takeaway shouldn’t be that GLP-1s automatically destroy muscle.
The takeaway should be that muscle preservation needs to become part of the weight-loss plan.
If your appetite drops dramatically, it can become difficult to consume enough calories, protein and other essential nutrients.
That’s why anyone pursuing significant weight loss—especially while using an appetite-suppressing medication—should pay attention to nutrition and resistance training.
Adequate protein gives your body the building blocks it needs, while resistance training provides an important stimulus to maintain muscle and strength.
Research published through PubMed on nutrition and resistance training during GLP-1 therapy discusses strategies for helping preserve lean mass during treatment.
The goal shouldn’t simply be to make the scale go down.
The goal should be to lose excess body fat while maintaining as much muscle, strength and function as possible.
This is another conversation that needs to happen before someone starts.
In the STEP 1 semaglutide extension study, participants who discontinued semaglutide regained approximately two-thirds of their previous weight loss within one year.
That doesn’t mean everyone will regain exactly that amount, and it doesn’t mean everyone taking a GLP-1 must remain on medication forever.
It does show that significant weight regain after stopping can occur.
If the medication reduces your appetite but you never develop better nutrition, exercise and lifestyle habits, what happens when that appetite returns?
That’s why sustainable behavior change needs to happen while the medication is helping you, not after.
GLP-1 medications can provide significant health benefits, but they’re still medications.
Depending on the drug, common side effects can include nausea, diarrhea, vomiting, constipation and abdominal discomfort. FDA labeling also includes important warnings and precautions that vary by medication.
Before starting one of these drugs, patients should understand both the potential benefits and risks with their medical provider. The FDA’s Wegovy prescribing information provides detailed safety information for semaglutide used for weight management.
This is another reason these medications should be used under appropriate medical supervision—not because a friend is taking them or because they’re trending on social media.
I’m not anti-GLP-1.
For the right person, under appropriate medical supervision, GLP-1 weight loss medications can be an incredible tool.
But they shouldn’t become a Band-Aid for habits that still need attention.
Whether medication is part of your journey or not, the fundamentals haven’t changed:
Strength train. Eat adequate protein. Improve the quality of your nutrition. Stay active. Build habits you can maintain.
Don’t judge success only by how many pounds you lose.
Ask yourself something more important:
Am I becoming healthier, stronger and more capable while I’m losing them?
That’s the outcome worth chasing.
Committed to your overall health,
This article is intended for general educational purposes and is not a substitute for individualized medical or nutrition advice.