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The GLP-1 Diet

Smaller, more frequent portions, protein first, easy on a stomach that's slowed down. Built to keep you nourished.

By Camille McLaughlin, RDN, LD, registered dietitian nutritionist

The medications people lump together as GLP-1s actually come in two types now: true GLP-1 drugs like Ozempic and Wegovy, and the newer GLP-1/GIP drugs like Mounjaro and Zepbound. Both curb your appetite and slow your digestion, so you'll naturally eat a lot less. That means every bite has to count. This plan keeps your portions small and spreads your eating across the day, using the meals and snacks you order, so you still get enough nourishment. It leads with protein to protect your muscle, and it keeps everything easy on a stomach that's emptying slowly. It works the same whichever medication you're on.

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How it works

Because these medications slow your digestion, big meals sit heavy and make the nausea worse. So the shift is toward smaller portions eaten more often. You take the meals you order and eat them in smaller amounts, leaning on snacks to fill the gaps between them. Normally I wouldn't tell anyone to graze. But when you can only manage a little at a time, eating small amounts through the day is how you get the nourishment your body needs. The nausea comes from that slowed-down system, so this looks a lot like eating for gastroparesis. Small portions, protein first, lower fat, and easing off heavy or very high-fiber foods on the days your stomach feels slow. Sip fluids between meals instead of filling up on them.

✓ What you'll eat

Smaller portions eaten more often through the day
Protein first at every meal and snack: eggs, chicken, fish, Greek yogurt, tofu, beans
Easy-to-digest, lower-fat foods
Cooked vegetables and softer fruit (gentler than raw and bulky)
Fiber for regularity, eased back on queasy days
Water and fluids sipped between meals

✕ What you'll limit

Large, heavy meals (they sit and worsen nausea)
Greasy, fried, and very fatty foods
Very high-fiber, raw, or bulky foods when your stomach feels slow
Sugary foods, alcohol, and carbonated drinks
Going too long without protein

Who it's a good fit for

Anyone on a GLP-1 or GLP-1/GIP medication, like Ozempic, Wegovy, Mounjaro, or Zepbound. It's built to help you lose fat while holding onto muscle. It also eases the side effects and helps you get real nutrition in even when your appetite is tiny.

Why the protein and muscle focus matters

Any time you lose a lot of weight quickly, some of what you lose is muscle, not just fat. That's not something the medication does to you. It's what fast weight loss does to anyone. On a GLP-1 it tends to happen for two reasons that are easy to fall into. One is climbing to the next dose when the dose you're already on is working, so the weight comes off faster than your body can keep up with. The other is that your appetite gets so small you can barely eat, and if you're not getting enough protein, your body starts breaking down its own muscle to get the amino acids it needs. In people losing weight this way, muscle has made up as much as 15 to 40 percent of the total they lost, which is a lot to give away.

Both of those are fixable, and that's the whole point of this plan. Staying on the lowest dose that's actually working keeps the weight loss at a pace your body can handle. And leading every small meal with protein, plus a little strength work when you can, gives your body the amino acids it needs so it stops raiding your muscle to find them. The goal isn't a smaller number on the scale. It's losing fat while holding onto the muscle you've got.

A dietitian's note

This plan works alongside a GLP-1 or GLP-1/GIP medication that your prescriber manages. It doesn't provide or adjust any medication. Here's my honest advice as a dietitian. Try to stay on the lowest dose that's working for you, and protect your muscle with enough protein plus some strength activity when you can. And please hear this part. If you reach a point where you truly can't eat or can't keep anything down, don't push through it. That's a sign to talk with your prescriber about lowering your dose. Getting enough nutrition matters far more than losing weight quickly.

Common questions

What should I eat on Ozempic, Wegovy, Mounjaro, or Zepbound?

Keep your portions small and eat more often, with protein first every time. Take your meals and eat them in smaller amounts, and lean on snacks to fill the gaps. Keep the food easy to digest, sip your fluids between meals, and go easy on greasy and sugary stuff. Your plan builds every day around all of that so you don't have to think about it.

Why smaller, more frequent portions?

When a medication shrinks your appetite this much, three full meals can leave you undernourished, and you can't comfortably fit much at one sitting anyway. Eating smaller amounts more often, your meals split up with snacks in between, helps you get enough protein and nutrition without overwhelming a slow stomach. I don't usually tell people to graze, but here it's the practical way to stay properly fed.

Why do these medications make me feel so nauseous and full?

Most of the nausea comes from your digestive system slowing down, so food moves through more slowly and sits longer. That's why this way of eating mirrors a plan for gastroparesis, with small, lower-fat, easy-to-digest meals. If it ever gets to the point where you can't keep food down, talk to your prescriber about adjusting your dose.

Why is protein so important on a GLP-1?

Fast weight loss can cost you muscle along with fat. Getting enough protein, and staying active, helps protect your lean muscle so more of what you lose is fat and not the muscle you want to keep.

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