Ozempic and muscle mass: How to prevent muscle loss and stay strong

What is Ozempic and how does it work?

Ozempic® (active ingredient: semaglutide) is an injectable medication approved for the treatment of type 2 diabetes, although its popularity has grown especially because of its ability to induce significant weight loss in people with obesity or overweight.

It belongs to the class of drugs known as GLP-1 receptor agonists (glucagon-like peptide-1), a hormone naturally released in the intestine after meals that acts on several body systems to regulate appetite, metabolism, and blood glucose control.

Mechanism of action

Semaglutide mimics the action of natural GLP-1, producing three main effects:

1. Appetite suppression: acts on receptors in the central nervous system (hypothalamus), reducing the sensation of hunger.

2. Delayed gastric emptying: food remains in the stomach longer, prolonging satiety.

3. Improved insulin response: promotes insulin secretion and reduces blood glucose after meals.

Overall, this leads to a drastic reduction in daily calorie intake, which promotes weight loss without the need to impose a restrictive diet.

What type of weight is lost with Ozempic?

Here is the key point: not all weight lost is fat.

Clinical studies have shown that between 25 and 40% of the weight lost with semaglutide consists of lean mass, that is, non-fat tissue such as skeletal muscle. This loss can negatively affect:

• Physical strength and athletic performance

• Basal metabolism

• Long-term bone and functional health

Type of tissue lost	Estimated percentage of total weight lost	Key implication
Body fat	60–75%	Desirable; improves appearance and metabolic health
Lean mass (muscle + water)	25–40%	Undesirable; affects strength and metabolism
Muscle mass (approximate)	15–20%	Risk of sarcopenia if no intervention is taken

Source: STEP 1 clinical trial – NEJM (2021)

That’s why it is essential to support the treatment with nutritional strategies and appropriate supplementation that help protect muscle.

The risk of losing muscle during treatment

Muscle loss during treatment with Ozempic® is not a minor side effect: it is a real, clinically documented risk. Although the drug’s primary purpose is to reduce body fat, the fact that it significantly decreases appetite and daily calorie intake can also lead to a significant reduction in lean mass.

What do the studies say?

In an analysis of the STEP 1 trial (semaglutide 2.4 mg in adults with obesity), up to 39% of the total weight loss was found to be fat-free mass (lean mass), a proportion far higher than would be expected from healthy weight loss.

This loss primarily affects muscle tissue, which has aesthetic, functional, and metabolic implications:

• Less physical strength and endurance.

• Reduced basal metabolic rate → higher risk of rebound.

• Higher risk of sarcopenia in older adults.

• Poorer tolerance of physical exercise.

• Greater fatigue and slower recovery after training.

Consequence	Impact on the body
↓ Muscle mass	Less strength, poorer performance, and greater fatigue
↓ Basal metabolic rate	The body burns fewer calories at rest
↓ Exercise tolerance	Lower endurance and poorer adaptation to training
↑ Risk of rebound	Easier to regain fat if muscle is lost
↑ Frailty and sarcopenia (in older adults)	Higher risk of falls, injuries, and loss of independence

These effects can appear even if the scale says you’re “doing well”. That’s why it’s essential to look beyond body weight and actively protect your muscle tissue.

A silent risk for those who do not train

This effect is especially relevant for people who:

• They do not engage in strength training.

• They follow very low-protein diets.

• They do not supplement properly with creatine, omega-3, or amino acids.

• They experience sustained appetite loss (something common with GLP-1).

In other words, Ozempic can help you lose weight, but if you do nothing to protect your muscle, you may also lose what you don’t want to lose.

Supplements to prevent muscle loss

When using a medication such as Ozempic®, it is most common to drastically reduce calorie intake… but protein consumption is often reduced as well, along with essential micronutrients and physical activity, creating the perfect environment for muscle loss.

The good news is that certain supplements can help you maintain your strength, metabolism, and muscle mass even if you are losing weight quickly. Below, we detail the most important ones and how you can find them within the Moremuscle range:

1. Protein powder: the first thing you need to ensure

The body needs essential amino acids to maintain muscle, and if it does not receive enough through the diet, it extracts them from muscle tissue. With Ozempic, many people eat less without realizing that they are also eating less protein.

Protein powder supplementation:

• It ensures an adequate dose of complete amino acids.

• It is easy to digest, quick to prepare, and well tolerated even with a low appetite.

• It promotes satiety and prevents muscle loss.

Moremuscle recommendations:

• Whey Protein: whey concentrate with an excellent amino acid profile. Ideal for breakfast or after training.

• Isolate 90 CFM: pure cross-flow microfiltered isolate, low in lactose and fat. Perfect for cutting or medical nutrition use.

• Iso Clear Protein: refreshing, water-like formula, lactose-free, ideal for people with low appetite or digestive issues.

• SOY Isolate90: complete plant-based source, suitable for vegan diets and sensitive digestion.

Recommended dose: 1 to 2 shakes daily, especially after training or as a replacement for a light meal.

Protein and Ozempic should always go hand in hand to prevent unwanted muscle breakdown.

2. Creatine: key to maintaining lean mass and performance

Creatine is one of the most scientifically validated supplements for preserving muscle, improving strength, and combating fatigue. Its role is especially important when you are in a calorie deficit or do not train with the same intensity.

Key benefits:

• Stimulates ATP synthesis (cellular energy).

• Increases strength even in a calorie deficit.

• Helps preserve muscle mass and prevent sarcopenia.

Moremuscle recommendations:

• Creatine Monohydrate: available in three superior-quality forms:

  • Creapure® (maximum purity)

  • Clonapure® (greater stability compared with conventional creatine)

  • 200 Mesh (micronized for better dissolution)

• Creamag: creatine with Albion® magnesium, enhanced absorption and no digestive discomfort.

• Creatine Performance: creatine + electrolytes, ideal for maintaining performance during weight-loss phases.

Ideal dose: 3–5 g daily, preferably with protein or after training.

The combination of creatine and Ozempic improves the quality of weight loss, helping preserve muscle while reducing fat.

3. Omega 3: protects muscle, reduces inflammation, and supports metabolism

Omega-3 essential fatty acids play an important role in metabolic health and muscle preservation, especially during calorie restriction and rapid weight loss. Omega-3s:

• Activate anabolic pathways (such as mTOR).

• Reduce muscle catabolism.

• Improve insulin sensitivity and systemic inflammation.

Moremuscle recommendations:

• Superba Krill Oil 2: phospholipids + EPA/DHA + astaxanthin. High bioavailability.

• Omega 3: high concentration of EPA and DHA per capsule. Ideal for daily use.

• Ultra Omega 3: more concentrated version for people who need additional metabolic or cardiovascular support.

• Omega 3-6-9: balanced blend of essential fatty acids for those seeking comprehensive lipid support.

4. Essential amino acids: direct support for protein synthesis

EAA (Essential Amino Acids) are essential for stimulating protein synthesis, especially in people who:

• Do not reach the minimum daily protein intake.

• Train while fasting.

• Follow a strict low-calorie diet.

Moremuscle recommendations:

• MG Amino: EAA + BCAA + electrolyte blend. Ideal during workouts or between meals to prevent catabolism.

• Master Amino: combination of L-lysine, L-leucine, L-valine, L-isoleucine, L-threonine, L-phenylalanine, L-histidine, L-methionine and L-tryptophan

Recap:

A well-designed plan with these supplements not only prevents muscle loss, but can help you stay strong, active, and maintain a healthy metabolism even while losing fat.

Incorporating supplements to prevent muscle loss is not optional; it is essential for maintaining your strength and health during weight loss with Ozempic.

Exercise and nutrition: the essential combination for preventing sarcopenia

Supplements help, yes. But nothing replaces the stimulus of exercise and a solid nutritional foundation. If you are using Ozempic or any other GLP-1, muscle loss is not inevitable, if you take proactive action.

What is sarcopenia?

It is the progressive loss of muscle mass and strength, usually associated with age… but it can also appear more rapidly in people who lose weight without taking care of their muscles.

With GLP-1 use, the combination of reduced appetite, lower protein intake, and a sedentary lifestyle creates the perfect environment for this.

The two key pillars: exercise + protein

1. Regular strength training:
Studies have shown that training at least 2–3 times per week with resistance exercises (weights, bands, functional exercises) drastically reduces muscle loss during weight loss.

2. Sufficient protein intake:
Even if you take supplements, you need at least 1.6–2.2 g of protein/kg of body weight/day to preserve muscle mass in a calorie deficit.

How to avoid muscle loss with Ozempic

Ideally: synergistic, not separate

The best results do not come from training alone, taking supplements alone, or eating well alone. The key lies in a synergistic approach:

• Train with a strength stimulus

• Eat enough protein at every meal

• Use strategic supplementation to complement it

• Follow the treatment with supervision and monitoring

The more planned your approach is, the more muscle you will preserve and the better your body transformation will be.

If you are being treated with Ozempic and want to avoid muscle loss, focus on three key areas: strength training, sufficient protein, and specific supplements such as creatine and omega-3. These supplements to prevent muscle loss, together with a healthy diet, ensure that Ozempic and your muscles can coexist without compromising your results.

References

1. Wilding, J.P.H. et al. (2021). Once-Weekly Semaglutide in Adults with Overweight or Obesity.
   Published in The New England Journal of Medicine. Key study from the STEP program documenting lean mass loss during semaglutide treatment.

2. Wolfe, R.R. (2017). The role of dietary protein in muscle mass preservation during weight loss.
   Published in The Journal of Nutrition. Review of the importance of protein in preventing muscle loss during dieting.

3. Tipton, K.D. & Phillips, S.M. (2013). Dietary protein for muscle mass: Review of mechanisms and practical implications.
   Published in Sports Medicine. Scientific review of the role of protein in muscle synthesis and preservation.

4. London, R.E. et al. (2022). GLP-1 receptor agonists and lean mass loss: Mechanisms and mitigation.
   Published in Current Diabetes Reports. Article on the mechanisms of GLP-1-induced muscle loss and mitigation strategies.