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GLP-1 Protein Calculator

GLP-1 Protein Calculator | Ozempic, Wegovy & Mounjaro Protein Needs

GLP-1 Protein
Calculator

Personalized Protein for Ozempic,
Wegovy & Mounjaro Users

Find your personalized daily protein target — protect muscle, maximize fat loss on your GLP-1 journey.

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About You
📏
Body Measurements
🎯
Your GLP-1 Goals
3
meals
per day
Your Daily Protein Goal
—g
protein per day
—
Minimum
1.2 g/kg
—
Recommended
1.6 g/kg
—
High Target
2.0 g/kg
—
Your muscle preservation score will appear here.
🍽️
Protein Per Meal

Spreading protein across meals maximizes muscle protein synthesis throughout the day.

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Example Day — How to Hit Your Target
Daily Total ≈ —g protein
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How This Calculator Works
1
Enter Your Stats Age, height, weight in metric or imperial units.
2
Select Your Medication Tirzepatide users may need a higher protein target.
3
Pick Your Goal Fat loss, muscle maintenance, or body recomp.
4
Get Per-Meal Targets Spread protein evenly across meals for best results.
⚕️ Medical Disclaimer: This calculator provides general nutritional guidance only. Always consult your healthcare provider or registered dietitian before making dietary changes, especially while on GLP-1 medication.
Data sources

Joint Advisory — ACLM, ASN, OMA, TOS

Nutritional priorities to support GLP-1 therapy for obesity — protein ranges, adjusted-weight formula, and upper limits. PMC12264624 ↗

Obesity Pillars — International Consensus

Practical recommendations: protein >1.2 g/kg/day distributed across meals combined with resistance training. PMC12661421 ↗

STEP-1 Body Composition Analysis

Semaglutide substudy demonstrating lean mass decreases alongside fat loss during GLP-1 treatment. PMC8089287 ↗

SURMOUNT-1 DXA Substudy

Tirzepatide body composition: ~75% fat mass and ~25% lean mass of total weight lost. PubMed 39996356 ↗

PROT-AGE Position Paper

Recommends 1.0–1.2 g/kg/day for older adults; notes kidney disease as an exception to higher protein targets. PubMed 23867520 ↗

BDA Manual of Dietetic Practice

Adjusted body weight formula: AdjBW = IBW + 0.25 × (actual weight − IBW). BDA Chapter 61 ↗

How Much Protein Do You Need on GLP-1?

GLP-1 receptor agonists like Ozempic, Wegovy, Mounjaro, and Zepbound dramatically reduce appetite, which drives weight loss — but also increases the risk of losing valuable muscle. Research consistently recommends 1.2–2.0 g of protein per kilogram of body weight per day to preserve lean mass during GLP-1 therapy.

Your precise target depends on body weight, age, activity level, and goal. This calculator accounts for all of them.

Why Protein Matters During GLP-1 Weight Loss

When weight drops rapidly — as it often does on GLP-1 medications — muscle mass can be lost alongside fat. Without adequate protein:

  • Up to 25–40% of weight lost may be lean muscle, not fat
  • Your metabolic rate slows, making weight regain far more likely
  • Strength, energy, and physical function all decline
  • Hunger between meals increases, making adherence harder

How We Calculate Your Protein Needs

Our formula uses your actual body weight with three evidence-based multipliers: 1.2 g/kg (minimum protection), 1.6 g/kg (recommended sweet spot), and 2.0 g/kg (high-performance target). These are fine-tuned based on activity level, goal, age, and GLP-1 medication type.

Frequently Asked Questions

On Ozempic (semaglutide), aim for 1.2–2.0 g of protein per kg of body weight daily. For an 80 kg person, that's 96–160 g/day. Higher intake (1.6–2.0 g/kg) is recommended if you are active or focused on preserving muscle during weight loss.
Wegovy users should target at minimum 1.2–1.6 g/kg per day, and up to 2.0 g/kg if exercising regularly. Since Wegovy significantly reduces appetite, prioritizing protein at every meal is essential to prevent muscle loss.
Yes. Clinical evidence shows that adequate protein (≥1.2 g/kg/day) combined with resistance training significantly reduces muscle loss during GLP-1-induced rapid weight loss. Without enough protein, up to 40% of weight lost can be lean muscle mass.
Top picks: chicken breast (31g/100g), eggs (6g each), Greek yogurt (15–18g/150g), cottage cheese (14g/100g), canned tuna (25g/100g), whey protein (20–25g/scoop). For vegetarians: paneer, tofu, lentils, and soy chunks.
Yes — whey protein is ideal on GLP-1 therapy. It is rapidly absorbed, leucine-rich, and easy to consume when appetite is suppressed. A single scoop adds 20–25g of protein with minimal volume.
Aim for 25–40g of protein per meal spread across 3–4 meals. Research shows muscle protein synthesis is maximized at around 30–40g per sitting. Eat protein-dense foods first before carbohydrates or fats.
Absolutely. Vegetarians can meet protein needs through Greek yogurt, paneer, cottage cheese, eggs, soy chunks, tofu, lentils, and chickpeas. Combining complementary plant proteins throughout the day ensures all essential amino acids are covered.
Yes — protein is the most satiating macronutrient, and its effects work synergistically with GLP-1's appetite suppression. High-protein meals slow gastric emptying, reduce ghrelin, and help stabilize blood sugar.
HTMLEOF echo "Done" Output

Data sources used by the protein calculator

Data sources

Joint Advisory — ACLM, ASN, OMA, TOS

Nutritional priorities to support GLP-1 therapy for obesity — protein ranges, adjusted-weight formula, and upper limits.

PMC12264624 ↗

Obesity Pillars — International Consensus

Practical recommendations: protein >1.2 g/kg/day distributed across meals combined with resistance training.

PMC12661421 ↗

STEP-1 Body Composition Analysis

Semaglutide substudy demonstrating lean mass decreases alongside fat loss during GLP-1 treatment.

PMC8089287 ↗

SURMOUNT-1 DXA Substudy

Tirzepatide body composition: ~75% fat mass and ~25% lean mass of total weight lost.

PubMed 39996356 ↗

PROT-AGE Position Paper

Recommends 1.0–1.2 g/kg/day for older adults; notes kidney disease as an exception to higher protein targets.

PubMed 23867520 ↗

BDA Manual of Dietetic Practice

Adjusted body weight formula: AdjBW = IBW + 0.25 × (actual weight − IBW).

BDA Chapter 61 ↗
NK
Nikhil Kumar ISSA Certified

Health, Nutrition & Fitness Enthusiast

Nikhil is passionate about health, nutrition, and fitness, with a strong focus on helping people make smarter lifestyle decisions through clear and research-backed information. He has completed a nutrition certification from Coursera and regularly explores the latest studies and developments in nutrition, healthy eating, fitness, and overall wellness to ensure his content remains accurate, practical, and up to date.

Important Medical Disclaimer

This calculator is intended for educational and informational purposes only and should not be considered medical advice. Always consult a qualified healthcare professional before making any changes to your medication regimen or dosing schedule.

All dosage estimates generated by this tool should be reviewed and confirmed by your healthcare provider. Glapp and its contributors are not responsible for any medication errors, adverse reactions, or health outcomes resulting from the use of this calculator.

GLP-1 Protein Calculator

Free GLP-1 Protein Calculator. Instantly determine how much protein you need daily to preserve muscle while using GLP-1 agonists for weight loss.

Operating System: Web Browser

Application Category: Health & Fitness

Editor's Rating:
5