What Are GLP-1 Medications? Dietitian Explains Ozempic & More

Published on: July 22, 2026

Nutrition

What Are GLP-1 Medications? What You Need to Know Before Starting Ozempic, Wegovy, or Zepbound

If you’ve spent even five minutes on social media lately, you’ve probably heard about GLP-1 medications.

Ozempic. Wegovy. Zepbound. Mounjaro.

Some people call them miracle drugs. Others warn they’re dangerous. And somewhere in the middle are millions of people wondering:

Do GLP-1 medications actually work?
Are they safe?
Will I gain the weight back if I stop taking them?
Am I even a good candidate?

As a Registered Dietitian Nutritionist, these are some of the most common questions I hear from patients. The truth is that GLP-1 medications are not magic, and they’re not the right solution for everyone.

That’s exactly why I dedicated an entire episode of The Health Confidence Podcast to separating fact from fiction.

🎙 Listen here: What Are GLP-1 Medications? What You Need to Know Before You Take One (🍎 Apple Podcasts Link 🔗)

🎙 Listen here: Listen to Episode on Spotify 🔗

What Are GLP-1 Medications?

GLP-1 stands for glucagon-like peptide-1, a hormone your body naturally produces after you eat.

This hormone helps:

regulate blood sugar
slow stomach emptying
increase feelings of fullness
reduce appetite
improve insulin response

GLP-1 medications mimic this natural hormone, helping many people eat less, improve blood sugar control, and lose weight when used alongside lifestyle changes and medical supervision. They were originally developed to treat type 2 diabetes, but several are now also approved for obesity treatment.

Common GLP-1 Medications

You may recognize these brand names:

Ozempic®
Wegovy®
Mounjaro®
Zepbound®

While they’re often grouped together in conversation, they aren’t all identical. Some medications act only on the GLP-1 receptor, while others also target additional hormone pathways that influence appetite and metabolism. Your medical history, goals, and insurance coverage all play a role in determining which option, if any, is appropriate.

Do GLP-1 Medications Work?

Research consistently shows these medications can produce significant weight loss while improving blood sugar and reducing obesity-related health risks when combined with comprehensive medical care and long-term lifestyle support. Some GLP-1 therapies also reduce cardiovascular risk in appropriate patients.

But here’s what often gets left out of the conversation:

The medication changes your appetite. It doesn’t automatically change your habits.

That’s where nutrition becomes essential.

The Biggest Mistake I See

Many people focus entirely on losing weight.

I focus on preserving health while they lose it.

If you’re eating dramatically less because of a GLP-1 medication but aren’t consuming enough protein, strength training, or meeting your nutrient needs, you may lose valuable lean muscle along with body fat. That can affect strength, metabolism, recovery, the immune system, and long-term health. Experts increasingly emphasize pairing GLP-1 therapy with adequate protein intake, resistance exercise, and individualized nutrition planning.

If people considering this drug haven’t had their body composition measured with an Omron or an InBody machine at their local health facility, and continuously measured throughout the duration of the use of the drug, they could be at risk for dangerous muscle loss.

Weight loss should improve your health, not compromise it. “Losing weight” as a goal is not as effective as “improving body composition.”

Are There Side Effects?

Like any medication, GLP-1s can have mild and severe side effects.

The most common include:

nausea
vomiting
constipation
diarrhea
bloating
decreased appetite

Some people experience persistent symptoms or find the medication isn’t a good fit. Emerging evidence also suggests that rapid weight loss and inadequate nutrition may contribute to issues like hair shedding and tooth and gum decay in some individuals, highlighting the importance of nutritional monitoring.

Dry Mouth: Reduced saliva production lowers the mouth’s ability to wash away bacteria and neutralize acids.

Acid Exposure: Nausea, vomiting, and acid reflux expose teeth to highly corrosive stomach acid.

Nutritional Deficiencies: Suppressed appetites can lead to lower intakes of key nutrients like calcium and vitamin D. [1, 2, 3, 4]

This is another reason why working with your healthcare team including a registered dietitian can make a significant difference.

https://www.healthline.com/health-news/ozempic-teeth-may-impact-dental-health

Serious side-effects of GLP-1 use I’ve seen often in my practice include:

GLP-1 medications can be associated with more severe complications that require immediate medical attention. These include: [1]

Pancreatitis: Severe, persistent abdominal pain that may radiate to your back, with or without vomiting.

Gallbladder Disease: Gallstones or inflammation of the gallbladder (cholecystitis), which can cause sudden, intense pain in the upper right abdomen.

Severe Kidney Injury: Symptoms include decreased urination or swelling in the legs and feet.

Severe Allergic Reactions: Trouble breathing or swelling of the face, lips, tongue, or throat.

Physical Fatigue: Being under-fueled, dehydrated, or dealing with GI side effects like nausea can lead to a drop in overall energy and sex drive. [1]

Body Image: Changes in body image (whether adjusting to a new physique or feeling disconnected) can also quietly suppress sexual interest. [1]

Genital Blood Flow: Emerging research, including a PubMed case report on anorgasmia, theorizes that GLP-1s may cause slight vasoconstriction, reducing blood flow to the genitals and interfering with arousal and orgasm capabilities.

Who Should Consider GLP-1 Medications?

There’s no one-size-fits-all answer.

GLP-1 medications aren’t simply cosmetic weight-loss tools.

They’re prescription medications intended for specific medical situations after your healthcare provider evaluates factors such as:

body weight
medical history
diabetes status
cardiovascular risk
previous weight-loss attempts
current medications
overall health goals

The decision should always be individualized.

The Conversation We Need to Be Having

The real question isn’t:

“Should I take a GLP-1?”

It’s:

“How do I improve my health in a way that’s sustainable?”

For some people, GLP-1 medications could become an incredibly helpful tool.

For others, improving sleep, nutrition, physical activity, stress management, or identifying underlying medical conditions may be the missing piece.

The goal isn’t simply eating less, and for people who are overweight or obese and have a lack of appetite, trouble planning meals, or other digestive issues, it could make all of their problems worse.

The goal is building a healthier body that you can maintain for years, not just until the prescription runs out.

Listen to the Full Podcast Episode

If you’re considering Ozempic, Wegovy, Zepbound, Mounjaro, or another GLP-1 medication, this episode will help you understand:

How GLP-1 medications actually work
Who they’re designed for
Common myths and misconceptions
Potential side effects
Questions to ask before starting treatment
Why nutrition matters just as much as the prescription

🎧 Listen now: https://podcasts.apple.com/us/podcast/what-are-glp-1-medications-what-you-need-to-know-before/id1582878408?i=1000776157789

Ready for Personalized Nutrition Guidance?

Whether you’re thinking about starting a GLP-1 medication, already taking one, or simply trying to improve your health without restrictive dieting, you don’t have to navigate it alone.

As a Registered Dietitian Nutritionist, I help people build sustainable habits, protect muscle mass, improve metabolic health, and develop the confidence to make informed decisions about their nutrition—whether or not medication is part of the plan.

If you’re ready to stop guessing and start building lasting health confidence, schedule an appointment today:

https://signup.faynutrition.com/book/nicole-chenard/57e951

or here:

https://nicolechenard.com/services/