GLP-1 Diet & Nutrition: What to Eat on Ozempic, Wegovy & Mounjaro

GLP-1 medications like Ozempic, Wegovy, Mounjaro, and Zepbound change how much you want to eat — which means what you eat matters more than ever. When your appetite shrinks, every bite has to work harder to keep you nourished, strong, and feeling well. This guide covers how to eat well on GLP-1 medication: how much protein you actually need, how to handle nausea, and how to build meals around a smaller appetite.

Basilino is a food companion, not a medical service. This article is general information, not medical advice — always follow your prescriber or dietitian.

How GLP-1 medications change the way you eat

GLP-1 receptor agonists slow how quickly your stomach empties and quiet the appetite signals in your brain. The result is that you feel full sooner, stay full longer, and often lose interest in food altogether. That's the point — but it creates three practical problems:

• You eat less, so it's easy to under-eat protein and key nutrients.
• Rich, greasy, or very sweet foods can trigger nausea when the stomach is emptying slowly.
• Dehydration and constipation are common, because you're consuming less overall.

The goal isn't to eat more — it's to make the smaller amount you do eat count.

The two ideas that explain almost everything

Nearly every piece of advice on this site follows from two facts about a slowed stomach. Learn these and you can work out the rest yourself.

One: fat and volume are the levers. Fat is the strongest natural brake on stomach emptying there is, and on this medication the brake is already applied. Volume and gas fill a stomach that isn't emptying. That's why fried food, cream sauces, big portions and fizzy drinks dominate every trigger list — and why the same calories, lean and moist and modest, go down without complaint. (Foods to avoid on GLP-1.)

Two: your constraint is space, not calories. Ordinary diet advice assumes calories are scarce and volume is free — eat a big bowl of something light. On GLP-1 that logic inverts. Calories don't stop you; a small, slow stomach does. So the food you want is the one carrying the most protein per gram, not per calorie. Thirty grams of protein is 100g of chicken or 300g of Greek yoghurt. (How much protein you need.)

Everything below is those two ideas applied.

Protein is the priority

When you're losing weight quickly, some of that loss can come from muscle unless you protect it. Protein is what preserves muscle, keeps you full, and steadies energy.

A 2025 joint clinical advisory from the American College of Lifestyle Medicine, American Society for Nutrition, Obesity Medicine Association, and The Obesity Society puts the target at 1.2–1.5g of protein per kilogram of body weight per day during rapid weight loss on GLP-1 therapy, or an absolute range of 80–120g a day — though your own number depends on your weight, activity, and your care team's guidance. The challenge on GLP-1 medication is hitting that in far fewer bites. (More detail: how much protein you need on GLP-1.)

Practical ways to get there:

• Lead every meal with protein. Eat the chicken, eggs, fish, tofu, or Greek yoghurt first, while your appetite is highest.
• Lean on genuinely protein-dense foods: chicken, fish, prawns, eggs, lean beef, cottage cheese, skyr, tofu, tempeh, and whey or a pea-and-rice powder.
• Spread it across the day. Three smaller protein hits are easier to absorb — and to stomach — than one large one.
• Keep easy options on hand for low-appetite days: a protein shake, a boiled egg, a tub of skyr.

A correction worth making, because a lot of GLP-1 advice gets it wrong: beans, lentils and chickpeas are not practical primary protein on this medication. Cooked lentils carry about 9g of protein per 100g, so matching a chicken breast means a third of a kilo of them — a volume you will not manage on your injection day. They are superb food and excellent fibre. Treat them as your fibre that happens to bring protein along, not the other way round.

That same advisory is explicit on a point people skip: protein is unlikely to protect muscle without resistance training alongside it. Two or three short sessions a week — bands, bodyweight, or weights — do most of the work. The food keeps the muscle fed; the training gives it a reason to stay.

Fibre, hydration, and the unglamorous essentials

Eating less makes constipation more likely, and slowed digestion can make it worse. Fibre and fluids are your friends:

• Aim for steady fibre from vegetables, fruit, oats, beans, and whole grains — increase it gradually to avoid bloating.
• Drink consistently through the day rather than gulping large amounts at once (which can feel uncomfortable on a full-feeling stomach).
• Don't drown your appetite — try to drink between meals rather than filling up on liquid right before eating, so you've got room for protein.

Here the two priorities collide, and it's worth naming rather than pretending. The UK fibre guideline is 30g a day. Your protein target might be 100g. On a small, slow stomach those two are competing for the same few hundred grams of food, and someone hitting 130g of protein is usually someone eating almost no plants — which is precisely how the constipation starts.

The way out is the same volume logic: use fibre that's dense rather than bulky. A tablespoon of chia is about 5g of fibre and takes up almost no room; the same 5g from broccoli is about 170g of broccoli. Chia, ground flaxseed and psyllium do quietly what a virtuous side salad can't. (GLP-1 constipation: foods that help.)

Eating through nausea

Nausea is the most common GLP-1 side effect, especially after a dose increase. Foods that help on a queasy day tend to be gentle, plain, lower-fat, and not too sweet:

• Bland, starchy foods: toast, rice, oats, crackers, plain potatoes.
• Cool or room-temperature foods, which smell less strong than hot ones.
• Ginger (tea, or in cooking) settles many stomachs.
• Small, frequent bites rather than full meals.

Foods that commonly trigger nausea: fried and greasy dishes, very rich or creamy meals, heavy sauces, and a lot of sugar at once. This is exactly why Basilino flags "gentle-day" recipes and tags rich, fried, or spicy ingredients — so you can pick what your stomach can handle today.

The bind nobody mentions is that everything on that "helps" list is close to protein-free, so the days you feel sickest are the days your protein collapses. The answer is cold, bland, low-volume protein: a shake made with water, a few spoons of skyr, a cold boiled egg. Land some protein rather than your target, and make it up in the back half of your dose cycle. (Foods that help with GLP-1 nausea.)

Building a GLP-1-friendly plate

A simple template for a satisfying, well-tolerated meal:

• Half a palm to a palm of protein — the non-negotiable, eaten first.
• A fist of vegetables or fruit for fibre and micronutrients.
• A small amount of slow carbs — oats, rice, potato, or whole grain — for steady energy.
• A little healthy fat for flavour and satiety, kept modest so it's easy on the stomach.

Portions will be smaller than you're used to. That's fine — consistency across the day matters more than the size of any single meal.

What changes over time

Eating on GLP-1 medication isn't one problem; it's three, in sequence.

The first few weeks. Side effects are at their loudest and appetite falls off a cliff. The goal here is tolerance, not optimisation — gentle food, some protein, enough fluid. Don't try to run a perfect diet on the month your stomach is least cooperative.

Each dose increase. Roughly a week of the first few weeks, repeated. Tolerance you built at one dose doesn't reliably carry to the next, and this is where people get caught out by a meal they'd been eating happily for months. Treat the fortnight after a titration step with the same caution you gave week one.

The long stretch on a stable dose. This is where nutrition actually happens, and where the risk changes shape. The threat is no longer nausea; it's slow, quiet under-eating — months of too little protein, too few plants, and lost muscle you won't notice until strength goes. The habits that matter here are dull and repeatable: protein first, a fibre source at most meals, and something to lift twice a week.

Micronutrients: the risk of eating less of everything

Cut your food intake by a third or a half and you cut everything in it, not just calories. Over months, that's a genuine consideration — iron, calcium, vitamin D, vitamin B12 and folate all come from food you're now eating less of.

This is not a reason to panic or to buy an expensive stack of supplements. It's a reason to make the food you do eat nutrient-dense rather than just protein-dense, and to raise the question at a review appointment. Whether a general multivitamin is sensible for you, and whether anything needs checking with a blood test, is a conversation for your prescriber or a dietitian — not something to guess at from a web page.

Alcohol

Worth its own line, because it catches people out. GLP-1 medication can heighten the effects of alcohol and irritate an already sensitive stomach, and many people find their appetite for drinking falls away on its own. Beer and sparkling wine add carbonation; sugary mixers add liquid sugar that costs you appetite you needed for protein.

If you drink, keep it modest, never on an empty stomach, and preferably not on your injection day.

A sample gentle day

• Breakfast: Greek yoghurt with berries and a spoon of oats (high protein, gentle, fibre).
• Lunch: A small portion of chicken or tofu with rice and steamed veg.
• Snack: A boiled egg or a protein shake if appetite is low.
• Dinner: Baked white fish with potato and greens — light, lean, easy to digest.

For a full week of this, see the 7-day GLP-1 meal plan, which totals the protein for each day so you can see how it adds up.

Where to go next

This guide is the overview. The detail lives in the specific ones:

• How much protein do you need on GLP-1? — targets, the protein-density table, and how to hit a number on a small appetite.
• Foods to avoid on GLP-1 — the trigger foods, why they trigger, and reading labels for sugar alcohols.
• GLP-1 nausea: foods that help — including how to land protein when nothing appeals.
• GLP-1 constipation: foods that help — fibre density, hydration, and when to ask about a laxative.
• 7-day GLP-1 meal plan — a full week with the protein totalled per day.
• High-protein breakfasts for a small appetite — and what to do if mornings are your worst time.
• Ozempic vs Wegovy vs Mounjaro vs Zepbound — what actually differs for eating.

Common questions

What should I eat on Ozempic?

Protein first, in the leanest and most compact form you can manage — chicken, fish, eggs, cottage cheese, skyr, tofu, or a shake. Add a fibre source at most meals, keep fat and portion size modest, and drink between meals rather than with them.

How many calories should I eat on GLP-1 medication?

There is no single answer, and be wary of pages that give you one. The medication suppresses appetite, so intake usually falls on its own; the job is to protect protein and nutrients within whatever you can eat. If you need a calorie target for medical reasons, it should come from your prescriber or a dietitian.

Why am I losing hair / feeling weak?

Both can follow from eating too little overall, and too little protein in particular, over a sustained period. Rapid weight loss makes it more likely. It's worth raising with your care team rather than pushing through.

Do I need supplements on GLP-1 medication?

Possibly, and it depends on how little you're eating and for how long. A general multivitamin is a reasonable thing to ask about at a review. Don't self-prescribe a cupboard full of them on the strength of a web page — including this one.

Can I eat normally again after stopping?

Appetite generally returns after stopping, and weight regain is common — which is why the muscle you protect and the eating habits you build while on the medication matter well beyond the prescription. What stopping should look like for you is a decision for your prescriber, not a food question.

How Basilino helps

Every Basilino recipe shows protein, fibre, and calories per serving, with gentle-day options and clear flags for the ingredients that tend to upset GLP-1 stomachs. You can track your daily protein against a goal, save the meals that work for you, and clip any recipe from the web — and we'll calculate the protein for you. It's a cookbook built for exactly this: eating well when you're eating less.

Sources & further reading

This guide is general information, not medical advice. For authoritative guidance, see:

• NHS — The Eatwell Guide (balanced diet, fibre, food groups)
• NHS — Constipation (fibre and fluids)
• British Dietetic Association — Protein
• ACLM/ASN/OMA/The Obesity Society — Nutritional Priorities to Support GLP-1 Therapy for Obesity (2025) (protein targets during GLP-1 therapy)

Your prescriber or a registered dietitian can give protein and nutrition targets tailored to you.

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