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

Why protein matters more when you're eating less

GLP-1 medications such as Wegovy and Ozempic (semaglutide) and Zepbound and Mounjaro (tirzepatide) reduce appetite, which is a big part of why they work. But eating less overall usually means eating less protein too. In the major clinical trials, a meaningful share of the weight people lost, often somewhere between a quarter and around 40 percent, came from lean mass rather than fat.^1,2

Lean mass includes muscle, which helps you stay strong, keeps you moving comfortably and supports your metabolism. Protecting it is one of the most important goals of nutrition care on a GLP-1.

How much is enough?

There isn't one agreed number yet, but expert guidance points in the same direction. A 2025 paper from the Academy of Nutrition and Dietetics recommends at least 60 grams of protein a day, and up to 1.5 grams per kilogram of ideal body weight during weight loss.³ A 2025 joint advisory from four US obesity and nutrition organizations notes that higher targets, around 1.2 to 1.6 grams per kilogram, have been proposed during active weight loss. It also points out that for people with obesity, using actual body weight can overestimate protein needs, so an adjusted or ideal body weight is often used instead.⁴

These figures are starting points, not rules. Kidney disease, a very high body weight, older age and other health conditions can all change what's right for you, which is why your dietitian calculates a personal target rather than using a one-size-fits-all number.

Five ways to reach your target with a small appetite

1. Eat protein first. Start each meal or snack with the protein part, before you fill up on anything else.
2. Aim for 20 to 30 grams at each meal. Three meals at that level, plus one or two protein snacks, gets most people close to their goal.
3. Choose soft, easy options on harder days. Greek yogurt, cottage cheese, eggs, tofu, lentil soup, fish and protein shakes are often easier to eat than a large piece of meat.
4. Drink some of it. A milk-based smoothie or a ready-made protein shake can add 20 to 30 grams when chewing feels like too much.
5. Keep easy snacks ready. String cheese, roasted chickpeas, edamame or a boiled egg make it simple to add protein between meals.

Signs you might not be getting enough

Feeling unusually tired or weak, noticing more hair shedding than usual, or finding everyday tasks harder can all be signs that protein, calories or other nutrients are running low. These symptoms have other possible causes too, so mention them to your prescriber and your dietitian rather than guessing.

The bottom line

Protein is one of the simplest ways to protect your muscle and energy while you lose weight on a GLP-1. A target that fits your body, your appetite and the foods you enjoy makes it far easier to stick with.