If you’ve been following the news, you’ve probably heard incredible stories about GLP-1 medications like Zepbound, Wegovy, and compounded tirzepatide. People are losing 20, 50, even 100 pounds, and for many, these medications have been truly life-changing.
But there’s an important conversation that doesn’t get nearly enough attention.
Losing weight and becoming healthier are not always the same thing.
The number on the scale only tells us how much weight you’ve lost. It doesn’t tell us what you lost.
Not All Weight Loss Is Fat Loss
When you lose weight, you’re rarely losing just body fat.
Weight loss is typically made up of a combination of fat, muscle, water, and glycogen (the carbohydrate stored in your muscles and liver).
Ideally, we want the majority of that weight loss to come from body fat while preserving as much lean muscle as possible.
Why?
Because muscle is one of the most important organs for long-term health.
Muscle Does More Than Make You Strong
Most people think of muscle as something that helps you lift weights or look toned.
In reality, muscle plays a much bigger role.
Healthy muscle helps regulate blood sugar, supports your metabolism, protects your bones, improves balance, reduces your risk of falls, and allows you to stay active and independent as you age.
The more muscle we preserve during weight loss, the healthier the outcome is likely to be.
That’s why my goal isn’t simply helping patients lose weight.
It’s helping them lose fat.
Why Muscle Loss Happens
GLP-1 medications work primarily by reducing appetite.
For many people, that’s exactly what they need.
But eating less also means you’re taking in fewer calories—and often less protein.
Without enough protein and resistance training, your body has less reason to maintain muscle. If you’re sedentary and eating very little, your body may begin breaking down muscle along with fat to meet its energy needs.
This isn’t unique to GLP-1 medications.
It happens with almost every type of rapid weight loss, whether it’s from a crash diet, bariatric surgery, or severe calorie restriction.
The difference is that GLP-1 medications make it much easier to eat less, so being intentional about nutrition becomes even more important.
Protein Is More Important Than Ever
One of the most common things I see is women unintentionally eating far too little protein.
They’re simply not hungry.
A protein shake becomes lunch.
Dinner is a few bites before they feel full.
While that may help the scale move quickly, it isn’t necessarily helping preserve muscle.
Protein provides the amino acids your body needs to repair and maintain lean tissue.
For most people trying to lose weight, prioritizing protein at every meal is one of the best investments they can make in their long-term health.
Walking Is Great—But It’s Usually Not Enough
Walking has tremendous health benefits.
It improves cardiovascular health, lowers stress, supports blood sugar control, and is one of my favorite forms of daily movement.
But if preserving muscle is the goal, walking isn’t enough on its own.
Your muscles need a reason to stay.
Resistance training sends that signal.
That doesn’t mean everyone needs to become a bodybuilder or spend hours in the gym.
Strength training can include free weights, machines, resistance bands, Pilates, or bodyweight exercises. The important thing is regularly challenging your muscles so your body recognizes that they are still needed.
The Goal Isn’t the Lowest Number on the Scale
Many women tell me they have a “goal weight.”
I understand why.
We’ve been taught to judge success by the number we see every morning.
But I would much rather see someone weigh five pounds more with more muscle, less body fat, and better strength than weigh five pounds less after losing valuable lean tissue.
Body composition matters far more than body weight alone.
Who Benefits the Most From Medical Weight Loss?
The answer isn’t the same for everyone.
Some women have obesity, insulin resistance, diabetes, or other medical conditions that significantly increase their health risks.
Others have already built healthy nutrition and exercise habits but find that hormonal changes during perimenopause or menopause have made it incredibly difficult to lose weight despite doing everything “right.”
These women may also benefit from medication, but the approach is different.
When someone only has 10 or 15 pounds to lose, preserving muscle becomes even more important because there is less excess body fat available to lose.
That means nutrition, protein intake, and strength training deserve even more attention throughout treatment.
Think of Medication as a Tool
One of my favorite analogies is to think of GLP-1 medications as a power tool.
A power drill can help you build something incredible.
But if you don’t know how to use it, it can also produce disappointing results.
The medication isn’t doing the work for you.
It’s making the work more effective.
By reducing hunger and food noise, GLP-1 medications create an opportunity to build healthier habits, improve nutrition, increase physical activity, and lose body fat more effectively than many people could through lifestyle changes alone.
The medication opens the door.
Your daily choices determine what happens once you walk through it.
The Bottom Line
Medical weight loss should never be about eating as little as possible or chasing the lowest number on the scale.
The real goal is improving health.
That means preserving muscle, prioritizing protein, staying physically active, and using medication as one part of a comprehensive plan—not the entire plan.
When weight loss is approached this way, the results extend far beyond the number on the scale. You aren’t simply losing weight. You’re building a stronger, healthier body that will continue to serve you for years to come.
