CALCULATOR
GLP-1 Protein Target
Protect muscle on appetite-suppressing medication with a target split into small, manageable servings.
General guidance only. Follow your clinician’s advice first.
Protein while using GLP-1 medication
GLP-1 medications suppress appetite strongly, which is what makes them effective and also what creates the nutritional problem: protein intake often collapses at exactly the point where the body needs more of it to hold onto muscle during rapid weight loss.
This calculator sets a protective daily target in the region of 1.2 to 1.5 g per kg of bodyweight and, more importantly, divides it into small servings. Five servings of 25 to 30 g are far more achievable on a suppressed appetite than three conventional meals.
Nutrition is only half of it. Resistance training is what signals to your body that muscle is worth keeping. Protein supplies the material; training supplies the reason. This is general nutritional information to discuss with the clinician managing your treatment, never a reason to change prescribed medication.
Why protein needs rise while appetite falls
Weight stable: bodyweight (kg) x 1.2 g
Per serving: daily target / number of servings
In any substantial calorie deficit the body draws on both fat and lean tissue. Rapid weight loss without adequate protein and resistance training shifts that balance toward muscle, which matters because lean mass supports metabolic rate, strength and long-term function. Appetite suppression makes hitting protein harder at exactly the point it matters most.
Protein targets by bodyweight
| Bodyweight | Actively losing | Weight stable | Per serving (5 a day) |
|---|---|---|---|
| 70 kg | 105 g | 84 g | 21 g |
| 85 kg | 128 g | 102 g | 26 g |
| 100 kg | 150 g | 120 g | 30 g |
| 115 kg | 173 g | 138 g | 35 g |
Practical strategies on a suppressed appetite
- Eat protein first. Appetite often fades partway through a meal, so front-load the protein portion before anything else on the plate.
- Use liquids. A shake carries 25 g in a small volume and tends to be tolerated better than an equivalent amount of solid food.
- Small and frequent. Five servings of 25 to 30 g are far more achievable than three conventional meals.
- Choose density over volume. Greek yogurt, cottage cheese, eggs and fish deliver more protein per bite than bulky foods.
- Keep lifting. Protein supplies the material; resistance training supplies the reason to keep the muscle.
Commonly discussed supporting nutrients
| Nutrient | Why it comes up | Discuss with your clinician |
|---|---|---|
| Protein | Muscle preservation during rapid loss | Target and sources |
| Fiber | Constipation is a common side effect | Type and timing |
| Electrolytes | Lower food and fluid intake | If symptoms appear |
| Vitamin B12 and iron | Reduced total food intake | Blood work if fatigued |
This page provides general nutritional information to bring to the clinician managing your treatment. It is not medical advice and is never a reason to change a prescribed medication or dose.
Frequently asked questions
How much protein should I eat on GLP-1 medication?
Why is muscle loss a concern?
What is the easiest way to get protein with no appetite?
Should I take supplements while on GLP-1 medication?
Sources
- Wilding JPH et al. Once-weekly semaglutide in adults with overweight or obesity. New England Journal of Medicine, 2021.
- Jager R et al. ISSN Position Stand: protein and exercise. JISSN, 2017.
- Ida S et al. Effects of resistance training on muscle mass during weight loss. Journal of Clinical Medicine.
- National Institutes of Health, Office of Dietary Supplements. Nutrient fact sheets. ods.od.nih.gov
- NHS. Nutrition and health guidance. nhs.uk
- US Departments of Agriculture and Health and Human Services. Dietary Guidelines for Americans, 2025-2030. dietaryguidelines.gov
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General information, not medical advice. Consult a qualified professional before changing your diet, especially with a medical condition.