GLP-1 Protein Calculator
GLP-1 medications quiet your appetite—which makes hitting your protein target harder exactly when muscle matters most. Estimate your daily protein in under a minute, then see what that looks like per meal.
Method & limits
How this calculator estimates your protein target
No black box. The estimate multiplies your body weight by an evidence-based protein factor (g/kg), then adjusts for the things that genuinely move the number on GLP-1: how long you’ve been on it, how active you are, and your age.
1 · Start with weight
Targets scale with body weight. If your BMI is 30 or above, the calculator uses an adjusted body weight (ideal weight + 25% of the difference) to avoid overestimating needs at higher weights. You can switch to actual weight in the result.
2 · Pick a protein factor
- First year on GLP-1 (active weight loss): 1.2–1.6 g/kg
- More than 1 year (typically maintenance): 0.8–1.0 g/kg
- Active-loss target: 1.4 g/kg at lower activity levels, up to 1.6 when Active or Very Active
- Age 65+ maintenance: 1.0–1.2 g/kg
- Daily high/target values are capped at 2.0 g/kg
3 · Read it as a range
The result shows a suggested target inside a practical daily range. Hitting the range consistently beats chasing a perfect number—and spreading protein across meals is easier on a low-appetite day.
What this calculator does not know
It can’t account for kidney disease, pregnancy, bariatric surgery history, or other conditions that change protein needs. It estimates a general target for healthy adults on GLP-1 therapy—your clinician or dietitian may set a different one for you, and theirs wins.
Same math, every medication
How much protein should you eat on your GLP-1?
Whatever you take, the target comes from your body—not the brand. What changes with GLP-1 is your appetite, which is why a clear daily number matters more, not less.
Tirzepatide
Protein on Zepbound
How much protein should I eat on Zepbound? The same weight-based target as anyone on GLP-1—but Zepbound’s stronger appetite suppression means most people need a plan (and protein-first meals) to actually reach it.
Tirzepatide
Protein on Mounjaro
Same molecule, same math. Use the calculator above with your current weight and training level, then spread the total across the meals you can comfortably eat.
Semaglutide
Protein on Wegovy
Wegovy users often ask whether semaglutide changes protein needs—it doesn’t. Rapid weight loss is what raises the stakes for muscle, and protein plus strength training is the standard counterweight.
Semaglutide
Protein on Ozempic
Ozempic is prescribed for type 2 diabetes, but the protein question is identical: a weight-based daily target, split into meals you can tolerate on low-appetite days.
Oral & compounded
Pills, drops & other GLP-1s
Rybelsus, oral Wegovy, compounded semaglutide or tirzepatide—the delivery method doesn’t change the protein math. Use the same target; log what you actually eat.
Not sure yet
Still choosing a medication?
This calculator can’t tell you which GLP-1 fits you—that decision belongs to you and your prescriber. It only estimates protein, whatever you land on.
When you’re just not hungry
What 25–30 g of protein actually looks like
On a low-appetite day, small and protein-dense beats a big plate you can’t finish. Portions below are approximate—labels and apps like Glowise give the exact numbers for what you eat.
Greek yogurt, plain
~17 g¾ cup (170 g). Cold, no cooking, easy on nausea. Add berries if you have room.
Protein shake
~20–25 g1 scoop with water or milk. The classic fallback when chewing feels like work.
Cottage cheese
~25 g1 cup (225 g). Mild, soft, and one of the most protein-per-bite foods in the fridge.
Chicken breast
~26 g3 oz (85 g) cooked—about a deck of cards. Eat the protein first, sides second.
Eggs
~12 g2 large eggs. Soft-scrambled goes down easier; add egg whites to push it higher.
Tofu, firm
~15 g5 oz (150 g). The plant-based staple—silken tofu also blends into smoothies invisibly.
Protein values are approximate, based on common USDA reference portions. Your brands and portions will differ—check labels.
Common questions
Protein on GLP-1, answered plainly
How much protein do I need on GLP-1?
A common evidence-based target during active weight loss—typically your first year on GLP-1—is roughly 1.2–1.6 grams per kilogram of body weight per day (using adjusted weight if your BMI is 30+), and around 0.8–1.0 g/kg in maintenance (1.0–1.2 g/kg for adults 65+). Being Active or Very Active moves an active-loss target toward the high end. The calculator above applies that logic to your stats.
Does my GLP-1 medication change my protein needs?
Not directly—semaglutide and tirzepatide don’t change how much protein your body uses. What they change is your appetite: eating less overall makes it easier to fall short, and losing weight quickly raises the risk of losing muscle along with fat. That’s why the same target matters more on GLP-1, not less.
What if I’m too nauseous to eat enough protein?
Go liquid and small: shakes, Greek yogurt, cottage cheese, silken tofu in a smoothie. Eat protein first at whatever meal feels easiest, and split the rest across the day instead of chasing one big number at dinner. If nausea is severe or persistent, talk to your prescriber—that’s a medication conversation, not a willpower problem.
Is more protein always better?
No. The calculator keeps the result inside a phase-specific range and never above about 2.0 g/kg. Some people—especially with kidney disease—need less protein, not more. More is only better until it crowds out fiber, water, and the calories you need. Stay inside the range unless your clinician says otherwise.
Should I use my current weight or my goal weight?
Use your current weight—the calculator adjusts automatically. If your BMI is 30 or above, it applies an adjusted body weight (ideal weight plus 25% of the excess) so the target doesn’t overshoot. If you’re close to your goal weight, current weight works fine as-is.
Is this calculator medical advice?
No. It’s an educational estimate built on published nutrition research for healthy adults. It doesn’t know your labs, your kidneys, or your history. Confirm any nutrition target with your healthcare provider or a registered dietitian.
Sources & review
Where the numbers come from
- International Society of Sports Nutrition Position Stand: protein and exercise — daily intake recommendations for preserving and building muscle during energy restriction.
- PROT-AGE Study Group — evidence that adults over ~65 benefit from higher per-kg protein intakes (about 1.0–1.2 g/kg and up with activity).
- Standard clinical-dietetics practice of using adjusted body weight for protein dosing when BMI ≥ 30.
- USDA FoodData Central — reference protein values for the food examples above.
Last updated July 14, 2026. This educational page follows our Medical Review Policy. Spot something wrong? Tell us.
A target only works if you can see what’s left of it.
Save your protein target in Glowise and track what you actually eat—by voice, photo, or barcode—next to your medication, water, and weight.
