How Much Protein on a GLP-1 to Keep Muscle?

If you want to keep muscle while a GLP-1 medication like Ozempic or Wegovy (semaglutide) or Zepbound or Mounjaro (tirzepatide) shrinks your appetite, protein is the lever that matters most. A widely cited evidence-based target during active weight loss is roughly 1.2 to 1.6 grams of protein per kilogram of body weight per day, which is about 0.5 to 0.7 grams per pound. That is general guidance, not a personalized prescription, so use it as a starting point and confirm your own number with a clinician or registered dietitian.

Why protein is the priority on a GLP-1

When you lose weight quickly in a calorie deficit, your body can pull energy from both fat and lean tissue. "Lean mass" includes muscle, water, and organ tissue, so it is not all skeletal muscle, but a meaningful share of it is the muscle you are trying to protect.

Adequate protein is the dietary signal that tells your body to hold onto muscle while it burns fat. Research on weight loss broadly suggests that protein intake matters more than total calorie level for how much muscle you keep. The catch on a GLP-1 is that appetite suppression naturally drives calorie and protein intake down, which is exactly the wrong direction for muscle preservation.

This is why protein gets first claim on your plate. When every bite counts because your appetite is small, you want those bites working hardest for muscle.

The protein target: what the guidelines actually say

The clearest recent guidance comes from a 2025 joint advisory published by the Obesity Medicine Association (OMA), The Obesity Society (TOS), the American College of Lifestyle Medicine (ACLM), and the American Society for Nutrition (ASN). For patients in active weight loss, that advisory points to roughly 1.2 to 1.6 g/kg/day of protein, calculated on adjusted body weight, with a broader range of about 1.2 to 2.0 g/kg depending on the individual.

The advisory also flags a practical absolute floor of roughly 80 to 120 g per day for many adults, and it generally does not recommend exceeding about 2.0 g/kg/day for this population. Importantly, the same advisory states that protein alone is likely inadequate to preserve muscle without resistance training. Protein sets the table; lifting tells your body to use it. We cover the training half in our guide to resistance training on a GLP-1.

For context, the International Society of Sports Nutrition (ISSN) position stand (PMC5477153) suggests 1.4 to 2.0 g/kg/day for general exercisers, and as high as 2.3 to 3.1 g/kg/day for resistance-trained athletes in a deficit. That athlete range is a different context from standard GLP-1 clinical guidance, so treat it as the upper bound of what the literature discusses, not a target most GLP-1 users should chase.

Protein target by body weight and goal

The table below converts the g/kg ranges into approximate daily protein in grams for sample body weights. Use the column that fits your situation, and remember these are rounded general estimates, not individualized prescriptions.

Body weight	Maintenance (~1.2 g/kg)	Active muscle preservation (~1.6 g/kg)	Older adults / higher end (~1.8 g/kg)
60 kg (132 lb)	~72 g/day	~96 g/day	~108 g/day
70 kg (154 lb)	~84 g/day	~112 g/day	~126 g/day
80 kg (176 lb)	~96 g/day	~128 g/day	~144 g/day
90 kg (198 lb)	~108 g/day	~144 g/day	~162 g/day
100 kg (220 lb)	~120 g/day	~160 g/day	~180 g/day
110 kg (243 lb)	~132 g/day	~176 g/day	~198 g/day

Targets derived from the OMA/TOS/ACLM/ASN 2025 advisory range (1.2 to 1.6 g/kg, broader 1.2 to 2.0). The older-adult column reflects general guidance that adults over roughly 60 may benefit from the higher end to counter age-related muscle decline; discuss your number with a clinician.

A note on the "adjusted body weight" detail: the advisory calculates protein on adjusted, not total, body weight for people with higher body fat. That can lower the target for heavier individuals compared with the simple total-weight math above. If you are well above a healthy weight, your real target may sit below the raw number in the table, which is one more reason to get a dietitian to run your specific case.

Why protein matters more than calories here

It is worth being clear about why protein, specifically, earns first place. In a calorie deficit, your body is looking for energy, and it can take that energy from fat or from lean tissue. Adequate dietary protein, especially the essential amino acid leucine, helps tip that decision toward sparing muscle by supporting muscle protein synthesis even while you are losing weight overall.

Total calories still matter for how fast you lose weight, but for the question of what kind of tissue you lose, protein and training are the deciding variables. You can run the same calorie deficit and end up keeping most of your muscle or losing a large share of it; the difference is largely whether the protein and resistance-training signals are present. That is why a 2025 SEMALEAN real-world cohort (PMC12673431) is reassuring: participants on semaglutide actually saw handgrip strength improve by roughly 4 kg on average and sarcopenic obesity prevalence drop, consistent with the idea that the outcome is modifiable rather than fixed by the drug.

Why so few GLP-1 users actually hit the target

Here is the uncomfortable part. A 2025 study by Johnson and colleagues (Nutrition; PMC12419545), looking at 60 GLP-1 users, found mean protein intake of about 88 g/day in men and 74 g/day in women. Only 43% hit the 1.2 g/kg/day minimum, only 10% reached 1.6 g/kg, and just 5% hit 2.0 g/kg.

That is a single cross-sectional study with a small sample, so it illustrates a pattern rather than proving an exact prevalence. But the direction is intuitive: the drug suppresses appetite, appetite suppression cuts intake, and protein, which is the most filling macronutrient, is often the first thing to slip.

In other words, fewer than half of GLP-1 users in that study were eating enough protein to give themselves the best shot at keeping muscle. The target is not the hard part. Hitting it with a suppressed appetite is. We walk through tactics in how to hit protein when a GLP-1 kills your appetite.

How to spread protein across the day

Total daily protein is what matters most, but distribution helps. Research on muscle protein synthesis suggests the body uses protein more efficiently when it arrives in moderate doses across the day rather than one large bolus. Practically, that means aiming for a meaningful protein hit (often cited around 25 to 40 g) at each of 3 to 4 eating occasions.

On a GLP-1, distribution also solves a logistics problem. If your appetite is gone by dinner, loading 60 g of protein into one evening meal may be physically impossible. Three or four smaller protein-forward moments are far more achievable than one big plate.

A simple framework many people use:

• Lead each meal with the protein, before the carbs and vegetables, while your appetite is largest.
• Keep one or two liquid or grab-and-go protein options for days when solid food feels like too much.
• Check your running total mid-afternoon so a low-appetite evening does not leave you 40 g short with no plan.

The best high-protein options that go down easily are covered in our high-protein foods for GLP-1 users guide.

Protein timing around your dose week

GLP-1 medications follow a predictable rise and fall across the dosing week, with appetite suppression often strongest in the first days after a dose and easing toward the next one. That means your "easy protein" days and your "hard protein" days can be somewhat predictable.

The practical move is to be a little more deliberate on the strongest-suppression days, leaning on liquid protein and protein-dense foods, and to take advantage of the days when appetite returns to eat more whole-food protein. None of this changes your weekly target; it just changes the tools you reach for on a given day.

Can you eat too much protein on a GLP-1?

For most healthy adults, the 1.2 to 1.6 g/kg range is well within safe territory, and protein in that band has a strong safety record. The 2025 advisory generally does not recommend exceeding about 2.0 g/kg/day for weight-loss patients, partly because there is little added muscle benefit beyond that point for most people and partly because very high protein can crowd out other nutrients on an already small appetite.

There is one important exception. People with chronic kidney disease or certain other conditions may need a lower, individualized protein target, because high protein intake can stress compromised kidneys. If you have any kidney concerns, a history of kidney stones, or other relevant conditions, do not chase a high-protein target on your own; have your clinician or a registered dietitian set your number. For most people, the realistic risk on a GLP-1 is eating too little protein, not too much.

Where Myo fits

Knowing your number is one thing. Hitting it 7 days a week while your appetite swings is another. Myo calculates a protein target from your body weight and goal, then tracks it on a daily protein ring against your dose schedule, so "eat more protein" becomes a concrete number you either hit or you do not.

Because Myo keeps that protein data next to your weight, body composition, and resistance-training logs, you can also see whether your protein habit is actually translating into preserved muscle over time, instead of guessing. The protein and fiber rings are free; the deeper body-composition and protein-coaching features are part of Premium. Either way, the point is the same: turn a clinical target into a habit you can measure.

Protein is the single highest-leverage muscle-preservation habit on a GLP-1, but it does not work in isolation. Pair it with resistance training, and you change the ratio of what you lose. For the full picture, start with our complete guide to GLP-1 and muscle loss.

References

• Obesity Medicine Association, The Obesity Society, American College of Lifestyle Medicine, and American Society for Nutrition. 2025 joint clinical advisory on protein and resistance training during weight loss (PMC12264624).
• Jäger R, et al. International Society of Sports Nutrition position stand: protein and exercise. ISSN (PMC5477153).
• Johnson, et al. 2025. Protein intake in GLP-1 receptor agonist users. Nutrition (PMC12419545).
• Resistance training and lean mass preservation during caloric restriction, meta-analysis (PMC5946208).