GLP-1 Weight Loss: Why Nutrition, Muscle Support and Habits Matter More Than You Think

GLP-1 weight loss medications* are changing the game when it comes to weight loss. But what’s not being talked about enough? What’s happening inside your body while the scale goes down. Specifically, the critical nutrition gaps that can put your muscle and long-term health at risk.

*Medical advice, treatment, prescriptions, and the overall practice of medicine must be provided by a licensed healthcare professional. OPTAVIA and its coaches do not engage in or provide any medical services.

Up to Half of the Weight Lost on GLP-1s Could Be Muscle**

That’s right. Studies show that up to 50% of total weight loss on GLP-1 medications can come from lean body mass** . And muscle isn’t just for strength. It’s the body's metabolic engine, powering everything from movement to energy regulation.

Even more eye-opening? In just 12–18 months on a GLP-1*, individuals could lose the equivalent of a decade’s worth of naturally occurring muscle loss.†

Protecting muscle is key to healthy weight loss — just like building healthy habits is key to keeping it off.

Related: Feeling Off Lately? It Might Be Your Metabolism Talking

GLP-1 Users Are Asking: "Now What?"

The medication may help suppress appetite, but it doesn’t come with a roadmap for what to eat, when to eat or how to stay nourished. That leaves many people wondering:

• What if I forget to eat?

• What’s the right GLP-1* diet?

• Am I getting enough nutrients?

• Should I be working out?

• How do I manage GLP-1* side effects like constipation?

• How do I avoid regaining weight once I stop?
  

Let’s be clear: Eating less is not the same as eating better.

That’s where OPTAVIA steps in with structure, support, and science-backed nutrition designed to fill the gaps your medication can’t.

From high-protein, nutrient-dense Fuelings to daily coaching and habit-building tools, OPTAVIA makes it easier to fuel your body, protect your muscle, and create lasting transformation.

Learn more: OPTAVIA Fuelings: The Science Inside Every Bite

Eat Better While Eating Less — With OPTAVIA’s Reset Phase

Plenty of products claim to support GLP-1* users. But few deliver the personalized structure your body actually needs.

Our Reset plan is appropriate for use alongside GLP-1s — helping turn reduced appetite into intentional, high-quality nutrition that delivers transformative results.

Our Reset 5 & 1 and 5 & 1 Active Plans helps you lose healthy, quality weight by targeting visceral fat and protecting what matters most — healthy muscle.

In as little as 16 weeks, clients on the Reset 5 & 1 Plan experience:

• 14% reduction in visceral fat^‡ 

• 98% lean mass retention^‡ 

• Protection of healthy muscle 

Because protecting muscle isn’t optional — it’s essential.

As Dr. Shawn Arent, a leading exercise science and sport performance researcher, explains:

“Think of muscle as your metabolic bank account. The more you maintain or build, the more resources your body has to manage energy and long-term metabolic function. Maintaining muscle isn’t just about strength — it’s one of the most powerful investments you can make in your health.” – Dr. Shawn Arent, Professor and Chair, Department of Exercise Science at the University of South Carolina; Director, USC Sport Science Lab; Medifast Scientific Advisory Board Member

Losing muscle during weight loss can slow metabolism and make it harder to maintain results long-term — which is why Reset is designed to help protect it from the start.

	GLP-1s + OPTAVIA	GLP-1s alone
Weight Loss	✔	✔
Appetite Suppression	✔	✔
Muscle Protection	✔	✘
1:1 Guidance and Support from a Coach	✔	✘
Supportive Community	✔	✘
Tailored Nutrition Plan	✔	✘
Healthy Habit Creation to Support Long-Term Success	✔	✘

Reset isn't just about losing weight.

It’s about losing quality weight — in a way that helps your body look better, feel better, and function at its best.

Each day, clients pair their high-quality protein-packed nutrient dense products with a whole-foods based Lean & Green meal — a daily opportunity to learn how to build the right plate with protein, veggies, and healthy fats.

Because even on days when eating feels like a chore, the body still needs fuel. And high-quality protein is a key player — the muscle-preserving star of nutrition to support the GLP-1 weight loss journey.

That’s where GLP-1s and Reset work better together:

GLP-1s may reduce appetite — but Reset helps ensure what you do eat is purposeful, protein-forward, nutrient dense, and structured to support muscle and metabolic health.

Related: What Is Metabolism and Why It's Impacted By What We Eat

Nutrition is Crucial When On a GLP-1, But It’s Not Enough

True transformation takes more than just protein and portion control; it takes people and habits.

That’s why OPTAVIA's Reset Plan goes beyond the plate. It delivers a full support system built to help clients make progress that lasts.

At the center of our system is the OPTAVIA coach.

Related: The Science of Support: What One Doctor Wants You to Know About Metabolic Health

They’ve been there. They’ve felt the highs and lows, asked the same questions and made healthy changes. A coach provides more than support. They serve as a sounding board, a motivator, and the biggest believer, helping clients stay on track and engaged throughout their transformation.

And they’re not doing it alone.

• You’ll plug into a community that gets it — a place to share wins, vent the tough days, and keep going

• You’ll lean on science-backed nutrition to help preserve muscle, support digestive health, and fill critical nutrient intake gaps

• You’ll build daily, doable habits that add up over time

• You’ll track it all with our digital app, making it easy to stay on course and see your progress in real time

Because while GLP-1s for weight loss can help take weight off, it’s the coach, community, and personalized structure that help you own your journey — and create real change.

Healthy Habits: The Real Game-Changer in Weight Loss (With or Without GLP-1s)

While GLP-1 weight loss medications can help reduce appetite and promote weight loss, they don’t teach sustainable behavior change. That’s where most approaches fall short — and where OPTAVIA stands apart.

At the core of the OPTAVIA program is an evidence-based habit-building system designed to support lifelong transformation. Because losing weight is one thing — keeping it off takes healthy habits that last.

OPTAVIA helps clients develop daily routines around:

• Habits of healthy eating, even when taking a GLP-1

• Consistent movement and exercise to support muscle health

• Simple self-care practices that may help to reduce stress and emotional eating

• Recognizing triggers and creating healthier responses

• Staying hydrated, energized and in tune with the body’s needs

• And more

With small steps, these habits add up to real momentum. And when paired with the accountability of a coach and the structure of OPTAVIA’s Reset Plans, they become the secret weapon for transformation.

Because when the medication ends, habits are what carry clients forward.

What Happens When the Meds Stop?

Research shows that after discontinuing a GLP-1, people regained up to two-thirds of their prior weight loss.‡

But the story doesn’t have to end there. We’ve seen transformation is possible when people:

• Have the support of a coach and community

• Build healthy habits during weight loss and keep them

• Continue using portion-controlled, nutrient-optimized products that fit seamlessly into real life

  
  

The Bottom Line

GLP-1 weight loss medications can jumpstart the journey — but structured support is what helps turn progress into real, lasting change.

With OPTAVIA’s Reset Plans healthy habit-building, and a dedicated coach in the client’s corner, the path to lasting transformation becomes clear and doable.

This isn’t just eating better while eating less — it’s building a healthier future, one simple step at a time.

*Medical advice, treatment, prescriptions, and the overall practice of medicine must be provided by a licensed healthcare professional. OPTAVIA and its coaches do not engage in or provide any medical services.

**Sargeant et al., 2019

†Sources: G.J. Grosicki, N.V. Dhurandhar, J.L. Unick, S.M. Arent, J.G. Thomas, H. Lofton, M.C. Shepherd, J. Kiel, C. Coleman, S.S. Jonnalagadda, Sculpting Success: The Importance of Diet and Physical Activity to Support Skeletal Muscle Health During Weight Loss with New Generation Anti-Obesity Medications, Current Developments in Nutrition, https://doi.org/10.1016/ j.cdnut.2024.104486. ; Locatelli JC, Costa JG, Haynes A, Naylor LH, Fegan PG, Yeap BB, Green DJ. Incretin-Based Weight Loss Pharmacotherapy: Can Resistance Exercise Optimize Changes in Body Composition? Diabetes Care. 2024 Oct 1;47(10):1718-1730. doi: 10.2337/dci23-0100. PMID: 38687506

‡In a clinical study, individuals on the OPTAVIA® 5 & 1 Plan® experienced a reduction of 14% visceral fat and 98% of lean mass was retained at 16 weeks.

Arterburn LM, et al. Randomized controlled trial assessing two commercial weight loss programs in adults with overweight or obesity. Obes Sci Pract. 2018;5(1):3-14. doi: 10.1002/osp4.312."

§Wilding JPH, et al; STEP 1 Study Group. Weight regain and cardiometabolic effects after withdrawal of semaglutide: The STEP 1 trial extension. Diabetes Obes Metab. 2022 Aug;24(8):1553-1564. doi: 10.1111/dom.14725.