What to Eat While Taking GLP-1: A Practical Guide to Protein, Fullness & Nutrient-Dense Foods

The 3 most important takeaways

• Eating less means every bite counts—nutrient density matters more than counting calories.
• Protein comes first—it helps preserve your muscle mass while you’re losing weight.
• Because you’re eating less overall, you’re at greater risk of nutrient deficiencies (such as iron, vitamin B12, and vitamin D), so these deserve special attention.

GLP-1 treatment reduces your appetite—that’s exactly how it works. The downside is that when you eat less overall, your body has fewer opportunities to get all the nutrients it needs. That’s why what you eat is even more important during GLP-1 treatment than with a traditional diet.

The good news is that you don’t need a complicated meal plan. A few simple principles are enough—and they’re well supported by recent recommendations from several medical societies (AJCN, 2025).

Why nutrition matters so much during GLP-1 treatment

Three reasons:

• Less volume, more nutrients. You’ll eat smaller portions, so every meal should provide as many nutrients as possible. Experts call this nutrient density: it’s not about how much you eat, but how nourishing your food is.
• Protect your muscles. Part of the weight you lose can come from muscle mass. Adequate protein and regular exercise help minimise this (read more in our article on muscles and weight loss). [2]
• Manage side effects. Choosing the right foods can help settle your digestive system, especially during the first weeks of treatment.

Get enough protein – your most important tool

If you remember just one thing, make it this: eat enough protein—and eat it first whenever possible. Protein helps you feel full, preserves muscle mass, and should be your priority when your appetite is reduced.

Current recommendations suggest around 1.2 to 1.6 g of protein per kilogram of body weight per day, with the higher end of the range being preferable during weight loss [1]. Good sources include cottage cheese, Greek yogurt or skyr, eggs, legumes, fish, poultry, and tofu. If it’s difficult to reach your protein target through food alone, a protein supplement may help.

Choose nutrient-dense foods over empty calories

Focus on minimally processed, nutrient-rich foods such as:

• Plenty of vegetables and fruit
• Whole grains instead of refined grains
• Legumes, lean protein, nuts, and seeds

Try to limit highly processed foods, refined grains, sugary drinks, added sugar, and processed meat. Not because these foods are “forbidden,” but because they provide lots of calories and relatively few nutrients—exactly what you can least afford when you’re eating less on GLP-1 treatment.

Don’t forget your micronutrients

This is a point many people overlook: if you eat significantly less, you also tend to consume fewer vitamins and minerals. Current medical recommendations highlight iron, vitamin B12, vitamin D, calcium, and thiamine (vitamin B1) as nutrients that deserve particular attention (AJCN, 2025). [1]

There’s no need to worry—but it is worth checking, ideally through testing rather than guessing. That’s where care’s Personalized Supplements come in: they translate your test results into a supplement tailored to your individual needs, helping to correct proven deficiencies instead of relying on guesswork.

Eating to reduce nausea and support digestion

Your stomach is often more sensitive during the first weeks of treatment and after dose increases. The following strategies can help (see our article on side effects for more details):

• Don’t skip meals. Smaller, more frequent meals are often better tolerated than large portions. [3]
• Avoid fatty, fried, and heavily spiced foods, as they can make nausea worse. [3]
• Drink enough fluids (around 2 litres per day) to help prevent constipation and dehydration.
• Eat plenty of fibre from vegetables, whole grains, and legumes to support healthy digestion.
• Ginger (for example, as ginger tea) may help relieve nausea for some people.

A simple plate guide

You don’t need to weigh your food. A simple rule of thumb is:

• Half your plate with vegetables
• One quarter with protein (and eat this first)
• One quarter with whole grains or other complex carbohydrates
• Water instead of sugary drinks

This simple approach helps you cover your protein, fibre, and nutrient needs—without using an app or counting calories.

How care supports you

Nutrition doesn’t have to be guesswork when you have the right data. At care, your monthly muscle and fat analysis shows whether you’re losing fat while preserving muscle, giving you clear, measurable feedback on whether your nutrition plan is working.

During your medical video consultations, you’ll receive personalised nutrition and lifestyle advice. If testing identifies nutrient deficiencies, care’s Personalized Supplements are tailored to help correct them. Instead of simply trying to “eat healthier,” you’ll have a plan based on your own health data.

Want to get started the right way? In the care programme, your nutrition is guided by your health data—with medical support and, where appropriate, personalised supplements.

→ Check your eligibility

Already with care? You’ll find your results and personalized recommendations in the App.

In brief

When you're on GLP-1 treatment, you naturally eat less—so the food you do eat needs to work harder. Prioritise protein (and eat it first), choose minimally processed, nutrient-dense foods, pay attention to key micronutrients, and support your digestion with smaller meals, plenty of fluids, and enough fibre. Combined with regular monitoring and medical guidance, these simple principles become a nutrition plan that's tailored to you—not just another good intention.

Frequently asked questions

How much protein should I eat while taking GLP-1? A general recommendation is around 1.2–1.6 g of protein per kilogram of body weight per day, with the higher end of the range being preferable during weight loss. Ideally, spread your protein intake across several meals. Your physician can help determine the right amount for you.

What should I eat if I feel nauseous? Choose smaller, more frequent, and milder meals. Don't skip meals, avoid fatty, fried, or heavily spiced foods, and make sure you drink enough fluids. Ginger helps many people. If your symptoms persist, speak to your physician.

Do I need dietary supplements? Not necessarily. However, because you eat less on GLP-1 treatment, deficiencies in nutrients such as iron, vitamin B12, and vitamin D can develop. The best approach is to measure your nutrient levels and supplement only where needed, rather than taking supplements just in case.

Do I need to count calories? No. Prioritising protein, choosing nutrient-dense foods, and following the simple plate method will usually get you much further than any calorie-counting app.

Medical disclaimer

This article is intended for general information and health education only. It does not replace personalised medical or nutritional advice. What is right for you depends on your individual health and test results. If you have any health concerns or symptoms, please consult a physician.