The 30-second summary
- On a GLP-1 your appetite is low, so the danger is not overeating, it is under-eating protein and losing muscle. Every plate should start with protein.
- Aim for 25 to 40 grams of protein per meal, then fibre, then a little starch or fat. Your daily total depends on your weight and dose, and the calculator works yours out. Keep portions small and eat slowly.
- Plain beats rich. Greasy, fried food sits badly when the stomach empties slowly. Lean protein, vegetables, and steady water are the whole game.
The one shift that changes everything
Most eating advice assumes you are fighting hunger. On a GLP-1 the fight is the opposite: appetite drops, and it is easy to reach mid-afternoon having eaten very little, then manage a few bites and feel full. That is exactly how you lose the wrong kind of weight.
Ozempic and Wegovy are the same medicine, semaglutide. The NHS lists Wegovy as the brand used to treat obesity, and Ozempic and Rybelsus as the brands used to manage type 2 diabetes. If you take Wegovy, what to eat on Wegovy covers its dose schedule; for tirzepatide, see what to eat on Mounjaro.
So the rule is simple: protein first, every time. That rule, and the rest of the plate order it belongs to, is set out with an example plan in the GLP-1 diet guide. Put the protein on the plate before anything else, and eat it before anything else. When appetite runs out after six bites, you want those bites to have been chicken, eggs, fish, tofu, Greek yoghurt, or a shake, not toast.
The plate, in order
Think of each meal as a sequence, not a pile:
- Protein first. 25 to 40 grams. Eggs, chicken, fish, prawns, tofu, tempeh, lentils, cottage cheese, Greek yoghurt.
- Fibre and colour next. Vegetables, salad, berries. Fibre eases the constipation that GLP-1s are famous for. (See constipation on a GLP-1.)
- A little starch or healthy fat last. A few potatoes, some rice, half an avocado. Not the star, the finish.
If appetite runs out at step one, you have still won.
What tends to sit badly
You do not need a list of forbidden foods, but some things simply feel worse now:
- Greasy and fried food. Slowed stomach emptying plus fat is the classic recipe for nausea. (See nausea on a GLP-1.)
- Very large portions. Your stomach empties slowly. A big plate that felt normal in the past can now mean hours of discomfort.
- A lot of alcohol. It hits harder and can worsen reflux and low mood. (See GLP-1s and alcohol.)
None of this is about willpower. It is about working with a slower gut, not against it.
Do not count calories, count protein
The instinct many women bring from years of dieting is to count calories and eat less. On a GLP-1 that instinct is actively harmful, because the drug already cut your intake. Under-eat on top of that and you risk losing muscle and arriving at your goal weight weaker. (See why muscle is the number that matters and protein on a GLP-1.)
Track protein and water instead. Those are the two numbers that protect your body while the medication does its work.
If you are just starting, read your first week on a GLP-1. For how a calorie target is worked out, and why appetite often decides the total, read how many calories to eat on a GLP-1.
What to do with this
The general advice is sound and it is not yours. The calculator turns it into a specific number: your calorie target, your protein floor, and an estimate of how much you are likely to manage at your current dose, which on semaglutide is often well below the target a standard calculator would hand you.
Sources
- Cermak NM, et al. Protein supplementation augments the adaptive response of skeletal muscle to resistance-type exercise: a meta-analysis. AJCN 2012. PubMed
- NHS. Semaglutide. nhs.uk
Medical disclaimer: Articles in the foodose research library are educational, not medical advice. Talk to your prescriber or a dietitian about your own nutrition. See our full medical disclaimer.