GLP-1 Medications Explained: What's the Difference Between Semaglutide, Tirzepatide, Liraglutide, and the Newer Options?

Not all GLP-1 medications work the same—and choosing the right one isn't about finding the "strongest" drug. It's about finding the best fit for your body, your goals, and your health.

If you've spent even five minutes on social media, you've probably heard names like Ozempic®, Wegovy®, Mounjaro®, Zepbound®, and compounded semaglutide.

Everyone seems to have an opinion.

Some claim one medication is "better." Others insist another causes fewer side effects. Meanwhile, celebrities, influencers, and pharmaceutical ads all make it sound like everyone should be taking the newest medication available.

The truth is much more nuanced.

At Evolved Women's Health, we believe medication should support your health—not replace it. We also believe that understanding how these medications work helps you make informed decisions instead of simply following trends.

Let's break down the major GLP-1 medications and discuss who may benefit from each.

First—What Is a GLP-1?

GLP-1 stands for Glucagon-Like Peptide-1, a hormone your body naturally releases after eating.

Its job is to:

• Increase insulin when needed

• Reduce glucagon

• Slow stomach emptying

• Help you feel full

• Reduce food cravings

• Improve blood sugar control

The medications simply mimic—or enhance—the action of this natural hormone.

Semaglutide (Ozempic® & Wegovy®)

This is probably the medication most people recognize.

Approved for

• Type 2 diabetes (Ozempic)

• Obesity and weight management (Wegovy)

How it works

Semaglutide is a GLP-1 receptor agonist.

It works only on the GLP-1 receptor.

Benefits

✔ Excellent appetite control

✔ Significant weight loss

✔ Improves insulin resistance

✔ Proven cardiovascular benefits

✔ Weekly injection

Average weight loss

Clinical trials show approximately 15% of starting body weight when paired with lifestyle changes.

Tirzepatide (Mounjaro® & Zepbound®)

Tirzepatide is technically not just a GLP-1 medication.

It works on two hormones:

• GLP-1

• GIP (Glucose-dependent Insulinotropic Polypeptide)

Because it activates both pathways, it's called a dual agonist.

Why does GIP matter?

Researchers believe GIP may:

• Improve insulin sensitivity

• Increase fat burning

• Improve how fat is stored

• Reduce nausea in some patients

• Improve weight loss

While we're still learning exactly how much GIP contributes, studies consistently show tirzepatide produces greater average weight loss than semaglutide.

Average weight loss

Around 20–22% of body weight in major clinical trials.

This currently represents the greatest average weight loss seen with an FDA-approved medication.

Potential advantages

• More weight loss

• Better blood sugar control

• Some patients experience fewer GI side effects

• May help patients who plateau on semaglutide

Liraglutide (Saxenda® & Victoza®)

Liraglutide was one of the first GLP-1 medications available.

Unlike semaglutide and tirzepatide...

It requires a daily injection.

Benefits

• Well studied

• Effective

• Good option if weekly medications aren't appropriate

Downsides

Less weight loss overall.

Average:

Approximately 5–8% body weight.

Because newer medications perform better, liraglutide is prescribed less frequently today.

Dulaglutide (Trulicity®)

Trulicity is primarily used for diabetes rather than weight loss.

While it does help some people lose weight, it generally produces less weight loss than semaglutide or tirzepatide.

It remains an excellent medication for blood sugar management and cardiovascular protection.

Exenatide (Byetta® & Bydureon®)

One of the earliest GLP-1 medications.

Today it is prescribed much less often because newer medications:

• last longer

• produce greater weight loss

• require fewer injections

• generally have better patient satisfaction

The Next Generation: Triple Agonists

Researchers are now studying medications that activate:

• GLP-1

• GIP

• Glucagon receptors

The leading investigational medication is retatrutide.

Early studies have shown weight loss approaching or exceeding 24% of body weight in some participants, but longer-term safety and effectiveness data are still being gathered before widespread clinical use.

Which Medication Causes the Fewest Side Effects?

Honestly…

The answer varies from person to person.

The most common side effects across all GLP-1 medications include:

• nausea

• constipation

• diarrhea

• reflux

• bloating

• decreased appetite

At our clinic, we find that how quickly the dose is increased often has a bigger impact on side effects than which medication someone takes.

That's why we emphasize outcome-driven dosing rather than automatically increasing the dose every month.

If you're losing weight at a healthy pace, preserving muscle, and tolerating the medication well, there may be no reason to increase the dose.

Is Tirzepatide Always Better?

Not necessarily.

While tirzepatide produces greater average weight loss in clinical trials, "better" depends on your goals.

Some patients do very well with semaglutide.

Others respond better to tirzepatide.

Some prioritize diabetes management, others cardiovascular protection, while others are focused on reducing food noise or treating obesity.

The best medication is the one that helps you reach your goals safely while minimizing side effects.

What About Muscle Loss?

This is one of the biggest concerns we have with GLP-1 medications.

The medication itself isn't necessarily the problem.

Rapid weight loss—especially without adequate protein intake and resistance training—can lead to loss of both fat and lean muscle.

At Evolved Women's Health, we work to protect muscle by emphasizing:

• adequate protein intake

• progressive strength training

• body composition monitoring (not just the scale)

• personalized dosing

• regular follow-up visits to adjust your plan as needed

Our goal isn't just to help you lose weight. It's to help you lose fat while maintaining the muscle and bone that support healthy aging.

Our Philosophy: It's About More Than the Medication

GLP-1 medications can be powerful tools, but they work best as part of a comprehensive health plan—not as a standalone solution.

At Evolved Women's Health, we pair medication with:

• comprehensive lab testing

• nutrition coaching

• strength training guidance

• body composition tracking

• hormone optimization when appropriate

• individualized treatment plans tailored to your goals

Rather than chasing the highest dose or the newest medication, we focus on helping you achieve sustainable, healthy results while protecting your long-term health.

Ready to Find the Right Fit?

If you're considering a GLP-1 medication—or wondering whether semaglutide, tirzepatide, or another option is right for you—our team can help.

We'll evaluate your medical history, goals, lab work, body composition, and lifestyle to create a personalized plan that supports lasting health, not just short-term weight loss.

Schedule a discovery call today at evolvedwomenshealth.com and learn how a medically supervised, whole-person approach can help you reach your goals with confidence.