Eating well on Ozempic or Mounjaro: protecting muscle, managing appetite and planning for later
GLP-1 medicines change appetite, and that changes what nutrition needs to do. A practical guide to eating well while you take them – and after.
This article is general information only. It does not discuss whether these medicines are right for you, or how to take them – that is a conversation with your prescribing doctor.
Medicines such as semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro) work partly by reducing appetite and slowing how quickly the stomach empties. Many people find they simply want to eat much less. That can feel like relief. It also means every meal has more work to do.
Why nutrition still matters
When you eat less, it becomes easier to fall short on protein, fibre, calcium, iron and other nutrients. Rapid weight loss can also include loss of muscle, not just fat. A recent joint advisory from US nutrition and obesity organisations highlighted nutrition support as an essential part of care for people taking these medicines.
Practical priorities
- Protein first: start meals with the protein part, so it is eaten before fullness sets in.
- Small, regular meals: smaller portions more often can be easier if you experience nausea.
- Fluids: sip water through the day, as thirst cues may also be reduced.
- Fibre, gradually: constipation is common; build fibre from vegetables, fruit, oats and legumes slowly.
- Go easy on rich, greasy foods if they worsen nausea or reflux.
- Keep moving, especially strength-based activity, to help protect muscle.
The emotional side of a quieter appetite
For some people, a reduced appetite brings unexpected feelings. If food has been a source of comfort or a way to cope, its absence can leave a gap. It is worth noticing this rather than pushing past it.
Planning for later
Research has shown that many people regain a substantial part of the weight they lost after stopping these medicines. Whether you take them short term or long term, the habits you build now – regular meals, enough protein, fibre and movement – are the ones that remain when the medicine changes. Make that plan with your prescriber and a dietitian.
Steady takeaway: at your next meal, eat the protein part first.
References
Mozaffarian D et al. Nutritional priorities to support GLP-1 therapy for obesity: a joint advisory. Am J Clin Nutr. 2025. Wilding JPH et al. Weight regain and cardiometabolic effects after withdrawal of semaglutide: the STEP 1 trial extension. Diabetes Obes Metab. 2022;24(8):1553–1564.