Weight-loss medications are changing the fitness industry, but they’re also creating a lot of confusion. One of the biggest questions we’re hearing at Union Studio is: What’s the difference between GLP-1 and GLP-3?
The short answer? GLP-1 medications are real and widely prescribed. “GLP-3” isn’t actually an official medical hormone or drug class. Instead, people often use the term “GLP-3” to describe triple-agonist medications currently being researched, which target GLP-1, GIP, and glucagon receptors all at once.
While these medications may help people lose weight, there’s one thing they cannot replace:
A smart, consistent exercise program.
What Is GLP-1?
GLP-1 (Glucagon-Like Peptide-1) is a hormone naturally produced in your gut after eating. Medications like semaglutide and liraglutide mimic this hormone by:
- Reducing appetite
- Helping you feel full longer
- Slowing stomach emptying
- Improving blood sugar control
For many people struggling with obesity or Type 2 diabetes, these medications have been life-changing.
However, rapid weight loss often comes with an important downside:
You don’t just lose fat—you can lose muscle, too.
What About “GLP-3”?
Despite what you may see online, there is no officially recognized hormone called GLP-3.
Instead, the nickname usually refers to triple agonist medications currently under investigation that stimulate:
- GLP-1 receptors
- GIP receptors
- Glucagon receptors
Researchers hope these medications may produce greater fat loss and improve metabolism compared to current GLP-1 medications, but they’re still being studied.
Why Exercise Is Even More Important
This is where personal training becomes incredibly valuable.
When people lose weight quickly—whether through medication, dieting, or surgery—they risk losing valuable lean muscle.
Muscle is important because it:
- Keeps your metabolism higher
- Improves balance
- Supports healthy joints
- Protects bone density
- Makes everyday activities easier
- Helps maintain long-term weight loss
Research consistently shows that combining resistance training with GLP-1 medications produces better body composition and metabolic outcomes than medication alone.
Strength Training Helps Your Body Naturally
One exciting area of research has shown that regular exercise actually increases your body’s own GLP-1 response after meals.
In one year-long study, participants who exercised increased their natural GLP-1 secretion by approximately 37%, helping regulate appetite even after weight loss.
That’s a powerful reminder that your body already has remarkable tools—it just needs the right stimulus.
The Union Studio Approach
At Union Studio, we believe medications are a tool—not a complete solution.
Whether you’re using a GLP-1 medication or simply trying to improve your health naturally, our focus is helping you:
- Preserve muscle while losing fat
- Improve strength safely
- Boost metabolism
- Increase energy
- Build lifelong healthy habits
After more than 21 years of personal training experience, we’ve learned that the best results happen when exercise, nutrition, and consistency work together.
Expert to Follow
One of the most respected voices on evidence-based fat loss and muscle preservation is Dr. Layne Norton. His science-backed content consistently emphasizes that preserving muscle through resistance training and adequate protein is essential during any weight-loss journey.
Ready to Get Stronger—With or Without Medication?
Whether you’re considering a GLP-1 medication, already taking one, or simply looking for a sustainable way to lose weight, exercise remains the foundation of long-term success.
At Union Studio, we create personalized strength-training programs that help you lose fat, preserve muscle, and build confidence for life.
Schedule your consultation today and discover how combining smart training with healthy habits can help you achieve results that last.