GLP-1s for Weight Loss: Are They Right for You? Expert Explains Body Composition Testing (2026)

Are GLP-1 medications right for you? It's a question on many minds, especially with these drugs gaining popularity for weight loss and diabetes management. But before you jump on the bandwagon, there's a crucial step you might be missing.

While some experts believe GLP-1s could benefit almost anyone, others stress the importance of a personalized approach. So, how do you know if these medications are a good fit? According to Dr. Rocio Salas-Whalen, an obesity medicine specialist and author of "Weightless," the answer lies in something often overlooked: body composition testing.

And this is the part most people miss... Most of us focus on the number on the scale, but that alone doesn't tell the whole story. As Dr. Salas-Whalen explains, that number doesn't reveal what's really happening inside your body. You could be losing muscle, water, or just a small amount of fat.

Body composition machines, found in many doctor's offices and gyms, offer a more detailed view. They measure three key markers of health:

  • Skeletal muscle mass
  • Body fat percentage
  • Visceral fat

These measurements can pinpoint potential health risks and highlight areas where you're thriving. Dr. Salas-Whalen emphasizes the importance of understanding your visceral fat, the fat surrounding your internal organs, which is linked to inflammation and insulin resistance. She also stresses the significance of your overall body fat percentage, which should ideally be around 28% or lower for women and 20% or lower for men.

But here's where it gets controversial... Skeletal muscle mass is another critical factor. Muscle acts as an anti-inflammatory agent and helps improve insulin sensitivity, using a significant portion of your glucose.

The goal isn't just weight loss; it's about achieving a healthy body composition. That's why GLP-1s aren't a one-size-fits-all solution. Dr. Salas-Whalen cautions against obtaining these medications without professional medical guidance. If you have a good body composition, you might already be reaping the benefits that GLP-1s offer, making the medication unnecessary and potentially risky.

Dr. Salas-Whalen encourages everyone to "know your numbers" after a body composition analysis, as the results can be eye-opening. While every individual's journey is unique, she believes that many people could benefit from GLP-1s.

A word of caution: The World Health Organization conditionally recommends long-term use of GLP-1 therapies (like liraglutide, semaglutide, and tirzepatide) for adults with obesity (BMI of 30 or higher) as part of a comprehensive obesity care plan. However, they do not endorse these medications for everyone, regardless of their health status.

What do you think? Are you considering GLP-1 medications? Have you had your body composition tested? Share your thoughts and experiences in the comments below – let's start a conversation!

GLP-1s for Weight Loss: Are They Right for You? Expert Explains Body Composition Testing (2026)
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