How much protein on a GLP-1, and how to actually reach it

By Ümit Can Erim · Published 9 October 2026 · Updated 9 October 2026 · Sources checked 9 October 2026 · How these guides are written

The figure you will see most is 1.2–1.6 g of protein per kilogram of body weight a day. It does not come from any GLP-1 label: it comes from nutrition guidance for people actively losing weight, and a 2025 joint advisory from four US medical and nutrition societies cites it as one proposed target. The same advisory adds two caveats that most charts leave out: nobody agrees which body weight to multiply, and protein on its own is unlikely to protect muscle without strength training. With a smaller appetite, the real problem is usually not the number. It is getting there.

Read this first. This is general nutrition information, not a target for you. If you have kidney disease, your protein target is set by your doctor and may be lower than anything on this page. A registered dietitian can turn these ranges into a plan that fits your body, your medicines and what you can actually eat.

Where the numbers come from

The advisory is "Nutritional priorities to support GLP-1 therapy for obesity", published in 2025 by the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association and The Obesity Society. Its protein section sets out a ladder of figures, all in grams per kilogram of body weight per day, and each one is attributed to a different body of guidance:

0.8 g/kg: the recommended daily allowance for the general adult population, which the advisory notes is under review.
1.2–1.6 g/kg: proposed during active weight reduction.
1.2–1.7 g/kg: proposed during strength training.
Floor and ceiling: intake should not fall below 0.4–0.5 g/kg, and prolonged intake above 2 g/kg should be avoided.
An alternative: an absolute daily target of 80–120 g, which the advisory says may be easier to stick to.

None of these appear in the prescribing information for Wegovy®, Zepbound® or any other GLP-1. The labels say the medicine is used with a reduced-calorie diet and increased physical activity, and leave the content of that diet to you and your care team.

Which weight do you multiply?

This is the part most calculators skip. The advisory says it is unclear whether these targets should use actual body weight, an adjusted or ideal body weight, or fat-free mass, and that using actual weight in people with obesity can significantly overestimate protein needs. The arithmetic shows why. At 80 kg, 1.2–1.6 g/kg is 96–128 g a day. At 120 kg, the same multiplication gives 144–192 g, close to the level the advisory says to avoid for long periods. The advisory itself does not settle this, so neither does this page. Ask your clinician or dietitian which weight they use for you, and write the answer down.

Why it gets harder on a GLP-1

The advisory is direct about it: on a GLP-1, adequate protein may be difficult to achieve because of reduced appetite and taste aversions, and low protein intake may contribute to muscle loss. When you can only manage half a plate, the half you eat matters more. Its practical suggestions are simple: eat the protein-rich part of the meal first, choose lower-volume foods that are dense in nutrients, and when appetite is low, smaller and more frequent meals may work better than three full ones. If changing what you eat is not enough, it suggests setting an alarm or another reminder to eat.

Foods that make it easier

The examples below are the ones the advisory names. It does not give gram values for them, and neither does this page: portions and brands vary too much. The nutrition label on the pack, or a database such as USDA FoodData Central, gives the number for the food in front of you.

Small but dense: fish, eggs, Greek yogurt, cottage cheese, nuts and seeds, and their spreads such as peanut or almond butter.
Easier on a reluctant stomach: smoothies or protein drinks made with milk or yogurt, and soups. The advisory notes these are often more appealing than heavier foods like red meat, cold cuts or hard cheese.
When food alone is not enough: high-protein shakes, bars and other fortified products help some people reach their target.

Do you have to split it into equal portions?

A common rule says the body can only use a fixed amount of protein at one sitting, often put at around 20–25 g, so anything beyond it is wasted. The evidence for a hard ceiling is weaker than that rule suggests. In a 2023 randomised trial in Cell Reports Medicine, 36 healthy young men who took 100 g of protein after a session of resistance exercise had a larger and longer-lasting muscle-building response than those who took 25 g. That is one small study in a specific group and setting, and it says nothing direct about people on a GLP-1. The practical reading is modest: spreading protein over three or four meals is mainly about what you can comfortably eat, not about beating a limit.

Protein is only half of it

The advisory is blunt that more protein alone is likely to be inadequate to preserve muscle without structured resistance or strength training, and that protein beyond what muscle needs can be converted to fat by the liver. It describes the goal as regular strength training at least three times a week alongside at least 150 minutes of moderate aerobic activity. What is safe for you to start with is a question for your clinician, especially if you have not trained before.

Tracking it without weighing every meal

The advisory recommends reassessing intake regularly during treatment, and names food logs and food photos as ways to do it. In Dozify, the AI meal photo (your first analysis free, then Premium) does the second: take or pick a photo and it estimates calories and protein for each item it sees. The result is always an editable draft: you correct items, add what it missed, remove what is wrong, and nothing is saved until you save it. The app says so on the screen: "This is an estimate — check it before saving." The day's protein total then sits beside your weight and your doses.

For the photo to be analysed, it is sent through Dozify's own server to Google Gemini; the app does not store the photo, the rest of your health data stays on your device, and you see a consent screen before first use. There is a daily limit on photo analyses. More on how it works on the AI calorie and protein tracker page.

Questions

Does my GLP-1 label give a protein target?

No. The labels say to use the medicine with a reduced-calorie diet and increased physical activity. The 1.2–1.6 g/kg range comes from nutrition guidance for weight loss, as cited in the 2025 joint advisory.

I have kidney disease. Does this apply to me?

Not without your doctor. With kidney disease, your protein target is set by your doctor and may be lower than the ranges here.

Do I need protein shakes?

Not necessarily. The advisory starts with foods such as fish, eggs, Greek yogurt and cottage cheese, and mentions shakes, bars and fortified products as a way some people reach their target when food alone falls short.

Is there a maximum amount of protein per meal?

The hard ceiling often quoted is weaker than it sounds: a small 2023 trial in young men found a larger and longer response to 100 g than to 25 g after resistance exercise. Spreading protein through the day is mostly about what your appetite allows.

How accurate is the photo estimate?

It is an estimate, and the app treats it as one: every result opens as a draft you can edit, and nothing is saved until you check it and save. Portion size is the part to look at most closely.

Educational information, not medical advice. Dozify is a personal tracking app, not a medical device. This page summarises published nutrition guidance and does not set a protein target, a diet, a dose or a course of action for any individual. Always follow the instructions that came with your medication and the advice of your prescriber or dietitian. Wegovy® and Zepbound® are trademarks of their respective owners; Dozify is not affiliated with these companies.