How to Get Enough Protein on a GLP-1 Medication

You're eating less. The scale is moving. Things seem to be going well.

But there's something worth paying attention to that doesn't show up in your weight: what's actually being lost. A study presented at ENDO 2025 by researchers at Mass General and Harvard found that roughly 40% of the weight lost on semaglutide comes from lean mass, meaning muscle, not fat. That's a significant chunk, and it matters more than the number on the scale suggests.

Muscle is what keeps your metabolism running. It's what makes daily movement feel manageable. And it's one of the main reasons the metabolic benefits of weight loss actually stick. Losing a lot of it quietly in the background isn't part of the plan.

Why This Happens on a GLP-1

The mechanism is pretty simple. GLP-1 medications suppress your appetite across the board. When you eat significantly less, protein intake drops right along with everything else, unless you're deliberately making sure it doesn't.

Most people aren't tracking this. You might be eating a few hundred calories a day, feeling full, and assuming things are fine. But if those calories are mostly crackers, yogurt, and whatever sounds tolerable, you're probably not hitting close to what your muscles need.

How Much You Actually Need

There's no single number that works for everyone. A joint clinical advisory published in the American Journal of Clinical Nutrition in 2025, developed by four major nutrition and obesity medicine organizations, recommends 1.2 to 1.5 grams of protein per kilogram of body weight per day for people on GLP-1 medications.

To make that concrete:

• If you weigh 150 lbs (about 68 kg): roughly 80–100g of protein per day
• If you weigh 200 lbs (about 91 kg): roughly 110–135g per day

The same advisory recommends spreading that across meals, aiming for 25 to 35 grams per sitting. Your body can only use so much protein at once for muscle synthesis, so front-loading it all in one meal doesn't have the same effect as distributing it through the day.

Practical Ways to Hit Your Target When You're Not Hungry

This is the hard part. When your appetite is genuinely suppressed, eating feels like a chore. Here are approaches that actually work when motivation to eat is low.

Eat your protein first. Whatever's on your plate, start with the protein before anything else. On a GLP-1, you'll often hit a wall of fullness halfway through a meal. If the chicken or eggs come last, they might not happen at all.

Know your best-tolerated sources. Some protein sources are just easier on a GLP-1 stomach than others. Things like Greek yogurt, eggs, cottage cheese, fish, and protein shakes tend to go down a lot better than red meat or anything fried. Build around what your body is accepting right now.

Use shakes on your worst days. The 24 to 48 hours after an injection are often when appetite disappears most completely. A protein shake with 25 to 30 grams of protein requires almost zero effort to get down and can fill a significant gap on days when real food sounds terrible.

Eat more often, but less at a time. Four or five smaller meals can work better than three standard ones. A smaller stomach window is easier to work with than forcing yourself to eat a full portion when your body is resisting.

Fortify what you're already eating. Stir unflavored protein powder into oatmeal. Blend it into a smoothie. Add Greek yogurt to sauces. These aren't big changes, but they add meaningful grams without requiring you to eat more volume.

Keep high-protein snacks close. String cheese, hard-boiled eggs, beef jerky, and single-serve Greek yogurt cups are all easy to grab without any preparation. When the window of willingness to eat is short, frictionless options are what you'll actually use.

Protein Isn't Enough on Its Own

Worth saying clearly: the same joint advisory that sets the protein targets also recommends resistance training alongside adequate protein intake. The two work together. Protein gives your muscles the building blocks to maintain themselves, but the signal to actually keep muscle comes from using it. Even two sessions of light strength work per week makes a difference. You don't have to go heavy. Showing up consistently matters more than how much you lift.

How Steadli Helps

Knowing you need more protein and actually building the daily habit of getting it are two different things. Steadli's habit prompts can help you practice protein-first eating at meals, log your highest-protein snacks, and build small, repeatable routines around nutrition even on your low-appetite days. Small actions, done consistently, are how a goal like this goes from something you know to something you do.

Your medication is working hard for you. Protecting your muscle is how you make sure the results last.

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This post is for informational purposes only and is not a substitute for medical advice. Talk to your prescribing provider or a registered dietitian about protein targets and nutrition goals specific to your situation.

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