GLP-1 medications change how you eat in two ways. They quiet appetite signals, so you simply want less food, and they slow gastric emptying, so what you do eat lingers longer in the stomach. The practical upshot is the same for everyone: you are working with fewer total bites each day, so the quality of those bites matters more than it ever has.
That is the lens for this whole guide. Less food, eaten well. Below you will find the foods worth prioritising, the ones worth limiting, a simple sample day, and the eating habits that tend to keep nausea and bloating at bay.
Protein first — and why it matters most
If you remember one thing, make it protein. A common target is at least 60 g of protein per day, built from roughly 20–40 g per meal. The reason is muscle. When you eat in a calorie deficit — which is what naturally happens on a GLP-1 — your body can draw on lean muscle as well as fat. Evidence suggests that without enough protein, up to 40% of the weight lost on a GLP-1 can come from muscle rather than fat.
Protecting muscle keeps you stronger, supports your metabolism, and helps the results you do see feel steadier. Protein also happens to be the most satisfying macronutrient per bite, which is exactly what you want when appetite is small.
Reliable, everyday sources to build meals around:
- Chicken breast — lean, versatile, high yield per gram
- Fish and salmon — protein plus omega-3 fats
- Eggs — compact and easy on a low-appetite morning
- Greek yoghurt — high protein, gentle, portable
- Lean beef — iron and dense protein
- Tofu and legumes — plant-forward protein with fibre
Want the detail? Read our deeper companion guide on protein on a GLP-1.
Best foods to eat on a GLP-1
A good GLP-1 plate is mostly protein and plants, with healthy fats playing a supporting role. The four pillars:
- Lean proteins at the centre of every meal (see the list above).
- High-fibre plants — leafy greens, lentils, berries and chia. Fibre supports digestion and helps the small amount you eat feel more complete.
- Healthy fats in moderation — avocado and nuts add flavour and nutrients, but they are energy-dense, so keep portions modest while appetite is low.
- Plenty of water. Hydration is easy to neglect when you are not hungry, and it helps with both digestion and the headaches some people notice early on.
A simple sample day
- Breakfast — Greek yoghurt with berries and chia, or eggs. A protein-led start sets the tone.
- Lunch — grilled chicken over a big salad with olive oil.
- Snack — a small handful of nuts if you need it.
- Dinner — baked salmon with roasted vegetables and a small serve of rice.
Notice the shape: protein anchors every meal, vegetables fill the plate, and starches and fats are present but restrained.
Foods to limit (they can worsen side effects)
Because food empties from the stomach more slowly on a GLP-1, certain foods sit longer and are far more likely to leave you uncomfortable. These are the usual culprits behind nausea, reflux and bloating:
- Large, fatty, fried or greasy meals — the single biggest trigger, since fat is the slowest thing to digest.
- Ultra-processed foods — typically high in fat and refined carbs, low in the protein and fibre you actually want.
- High-sugar foods and soft drink — quick to upset the stomach and easy to over-consume in liquid form.
- Alcohol — adds to nausea, sits poorly with delayed emptying, and offers little nutritionally.
None of this needs to be all-or-nothing. The point is that smaller, lighter, protein-forward meals simply feel better on a GLP-1 — and the heavier the meal, the more your body will let you know.
Eating tips that reduce nausea
How you eat matters as much as what you eat. A few habits make the difference:
- Smaller portions. Serve less than you think you need — you can always have more.
- Eat slowly. Fullness signals lag, and a slow pace lets them catch up.
- Stop at "satisfied", not "full". On a GLP-1, "full" often means you have already had too much.
- Choose nutrient density over volume. With limited appetite, make each bite count rather than filling the plate.
- Front-load protein when appetite is highest. Eat the protein on your plate first, while you still feel like eating.
When you can't face a meal
Some days a full plate feels like too much, and that is normal. On those low-appetite days, the goal shifts from "eat a proper meal" to simply "get protein and fluids in". A protein shake or a tub of Greek yoghurt is a portable, high-density option that delivers what you need in a few easy mouthfuls. It is far better to have a shake than to skip intake entirely and fall short on protein for the day.
How Preptide makes this easier
Everything above is, in effect, a description of how Preptide's ON-phase meals are designed. They are built to match exactly how you need to eat on a GLP-1: 27 g or more of protein, lower in fat so they sit gently on the stomach, and portion-aligned for a smaller appetite — no weighing, counting or guesswork.
It is the protein-first, lighter, nausea-aware plate, made for you each week.
FAQ
How much protein should I eat on Ozempic?
Most guidance points to at least 60 g of protein per day, spread as 20–40 g across each meal. Because appetite is lower on a GLP-1, protein is the nutrient to protect first to help maintain lean muscle while you eat less overall. Your prescriber or dietitian can set a target right for your body weight and goals.
What foods cause nausea on Ozempic?
Large, fatty, fried or greasy meals are the most common triggers, along with ultra-processed foods, very sugary foods and drinks, soft drink and alcohol. Because food leaves the stomach more slowly on a GLP-1, these foods sit longer and tend to worsen nausea, reflux and bloating. Smaller, lighter, protein-forward meals are usually gentler.
Can I drink coffee or alcohol on a GLP-1?
Coffee in moderation is generally fine, though some people find it adds to reflux or nausea on an empty stomach, so pair it with food and stay hydrated. Alcohol is best limited: it can intensify nausea, sits poorly with delayed stomach emptying, and adds low-quality kilojoules. Always follow the advice of your prescribing doctor.
Do I need to count calories on Ozempic?
Not necessarily. Appetite usually drops on its own, so the bigger risk is eating too little protein rather than too much overall. Many people do better focusing on protein per meal and food quality instead of strict calorie counting. Discuss the right approach with your dietitian or prescriber.
What should I eat if I have no appetite?
On low-appetite days, reach for nutrient-dense, easy options: a protein shake, Greek yoghurt, or a few bites of a high-protein meal. The goal is to still get protein and fluids in even when a full plate feels like too much, rather than skipping intake altogether.
Should I take a protein supplement?
Whole-food protein should come first, but a protein shake can be a practical top-up on days when appetite is low or you fall short of your target. It is a tool, not a replacement for balanced meals. Check with your dietitian if you have kidney concerns or other conditions before adding supplements.
Protein-first meals, sized for a smaller appetite.
Take the two-minute quiz and we'll match you to ON-phase meals that hit your protein target and stay gentle on the stomach.
This article is general information, not medical or dietetic advice. Preptide is food, not medication. Always consult your prescribing doctor or accredited dietitian before changing your diet alongside any medication. Read our full Health Acknowledgement →