How much protein do you need on a GLP-1?

There is no one protein number that fits everyone on a GLP-1 medicine. A 2025 joint nutrition advisory discusses about 1.2 to 1.6 grams of protein per kilogram a day during weight loss, but experts are not sure which weight to use, so your provider or a dietitian can turn it into a daily amount that fits you.

Why protein matters when you lose weight

When you lose weight, you lose some fat and some lean tissue, and lean tissue includes muscle. In one study of tirzepatide, about three quarters of the weight people lost was fat and about one quarter was lean mass. That was a group average, and lean mass is not the same as muscle, so it does not show what one person lost.

Protein and strength training work together to help support muscle. Eating more protein alone does not do the same job as strength training.

How much protein

The advisory's range is about 1.2 to 1.6 grams per kilogram a day while you are losing weight.
Experts are not sure which body weight to use for people with obesity, and using your current weight can overestimate what you need.
For older adults, one expert group uses at least 1 gram per kilogram a day as a starting point, adjusted by a clinician.
If you have kidney disease, do not use a high-protein weight-loss goal on your own. Your goal may be different: often lower, but often higher if you are on dialysis. Plan it with your kidney team.
After weight-loss surgery, your surgery dietitian sets your protein goal.

Ask your provider or a dietitian to turn the range into grams for your day.

Easy protein when you are not hungry

Spread protein across your meals instead of eating it all at once.
Smaller meals and small, nutrient-rich foods can be easier, like yogurt, cottage cheese, eggs, fish, soup, beans or a protein drink.
Other good protein sources include dairy, beans and other legumes, and lean poultry.
A reminder to eat can help when you do not feel hungry.
Eating very little is not the goal. It can leave you short on protein and other nutrients.

Pair it with strength work

Work your major muscles at least two days a week, using your body weight, bands, machines or weights.
Start with a load you can manage and build up slowly. You do not need to lift until you cannot do one more.
In a 2025 review of 25 studies, people who added strength training while losing weight lost less fat-free mass, which includes muscle, bone and water, and more fat than people who only changed how they ate.
For most people, getting enough protein across the whole day matters more than eating it right after a workout.

When to check in

Tell your provider if you feel weaker, find daily tasks harder, or have trouble eating enough. Protein goals are different for some people, including people with kidney disease, heart failure or liver scarring, so your own provider is the best person to set yours.

This page is general information, not medical advice.

Sources

The health facts on this page come from these sources.

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