Medications
Getting the best results on Wegovy or Mounjaro: the complete guide
The five habits that decide how well weight loss injections work.
Well Revolution
August 26, 2026
The five habits that decide how well the medicine works, and how to keep the results for good
Two people start the same medication in the same month. A year later, one has more energy, sleeps better, moves more freely and has kept the weight off. The other lost weight for a while, felt flat and weak, and watched the scale creep back up. Same medicine. Different results.
The difference is almost never the injection itself. Wegovy (semaglutide) and Mounjaro (tirzepatide) are genuinely effective medicines: in large clinical trials, people lost around 15 to 21 percent of their body weight on average. But in every one of those trials, the medication came wrapped in a support programme covering food, activity and regular follow-up. The injection is one part of your treatment, not the whole treatment.
This guide covers the five habits that make the biggest difference, based on the current research. Each one links to a detailed article if you want to go deeper.
1. Think long term
Obesity has been formally recognised as a chronic, relapsing condition, most recently by the 2025 Lancet Commission on clinical obesity. That is not a label designed to discourage anyone. It is the key to understanding how these medicines work: they help while you are taking them, and your biology does not change when you stop.
The trial data is consistent. When people stopped semaglutide after about a year, they regained roughly two thirds of the weight they had lost within the following year. When people stopped tirzepatide after 36 weeks of treatment, they regained around 14 percent of their body weight over the next year, while those who continued kept losing.
The encouraging part of the story is newer: you do not necessarily need the highest dose forever. In the SURMOUNT-MAINTAIN trial, published in The Lancet in 2026, people who reached their goal and then dropped to a lower maintenance dose kept most of their weight off. Maintenance is a phase of treatment that you plan with your doctor, not a cliff edge.
So start with the right mindset: this is a journey of months and years, with a weight loss phase and then a maintenance phase, and your care team alongside you for both.
Read the full article: Why weight loss medication is long-term treatment, and what really happens if you stop
2. Make protein your priority
These medicines work by turning appetite down. That is the point, but it has a side effect: you eat less of everything, including protein. Without enough protein, a meaningful share of the weight you lose is muscle rather than fat. In body composition substudies of the major trials, lean tissue made up roughly a quarter to two fifths of the total weight lost.
Muscle matters more than most people realise. It drives your metabolism, protects your bones and joints, keeps you strong for daily life, and is much harder to rebuild than fat is to lose, especially past middle age.
The 2025 joint advisory from four American nutrition and obesity organisations recommends around 1.2 to 2.0 grams of protein per kilogram of adjusted body weight per day during significant weight loss, or a simple target of 80 to 120 grams a day. In practice, that means protein at every meal, around 30 grams each time: eggs, chicken, fish, mince, tofu, Greek yoghurt, cottage cheese, legumes, or a protein shake when appetite is low. If you only manage a small amount of food, eat the protein first.
Read the full article: Protein on weight loss medication: how much you need and how to actually get it
3. Do strength work every week
Protein protects muscle. Strength training tells your body to keep it. The research is clear that the combination works better than either alone: people who do resistance exercise during weight loss hold on to significantly more lean mass than people who only do cardio, or nothing.
This does not mean joining a gym unless you want to. Two or three short sessions a week of bodyweight exercises, resistance bands or a pair of dumbbells at home counts. Squats to a chair, wall push ups, step ups and carrying the shopping are all strength work. Add regular walking for your heart, mood and joints.
One caution from the clinic: more is not always better. Punishing high intensity regimes are hard to sustain and are not required. Consistent, moderate strength work is what protects muscle.
Read the full article: Strength training on weight loss injections: lose the fat, keep the muscle
4. Eat small, regular meals
It sounds strange to say that the biggest eating problem on an appetite suppressing medicine is eating too little, but it is common. Skipping meals makes nausea worse, drains your energy, strips out nutrients your body needs, and can stall your progress. Many people arrive at treatment after years of restrictive dieting and are already low on iron, vitamin D or other nutrients before they start.
Aim for three smaller meals a day, built around protein and vegetables, even on days you feel no hunger at all. Regular eating is also the single best home remedy for nausea on these medicines. If a meal will not go down, a protein shake or a proper meal replacement drink is a perfectly good backup, and much better than nothing.
Read the full article: How to eat on a weekly weight loss injection
5. Get support, and use the free options
In every major trial of these medicines, participants had regular contact with a care team, dietary support and counselling. That support was not decoration. It is part of why the trial results were as good as they were, and people who go it alone tend to get less out of treatment.
In New Zealand you have more support options than you might think:
- Your prescriber and care team. At Well Revolution, your treatment includes unlimited access to your care team and GP while you are on a treatment plan. Use it: questions, side effects, plateaus, dose worries, anything.
- A registered dietitian or nutritionist. The gold standard for personalised eating advice, especially if you have a long dieting history, other health conditions, or have had bariatric surgery. Our care team can point you in the right direction.
- A Health Improvement Practitioner or Health Coach, free at many practices. Many general practices now have these roles in the team. They are free of charge, no referral is needed, and they can work with you on eating habits, activity, sleep, stress and motivation. Phone the practice you are enrolled with and ask.
Read the full article: Free help with eating and habits: dietitians, Health Improvement Practitioners and your care team
Also worth knowing
Side effects are usually manageable. Nausea and constipation are the common ones. Both respond well to practical steps, and constipation in particular is better managed early and consistently than reactively. See Nausea and constipation on Wegovy and Mounjaro: what actually works.
Sleep and stress are real levers. Short sleep and chronic stress both push appetite hormones in the wrong direction and make weight loss measurably harder. See Sleep, stress and weight loss.
Plan the maintenance phase before you reach it. Reaching your goal weight is not the end of treatment, it is a transition. Dose reduction done properly, at the right time, with support, is now well supported by evidence. See How to reduce your dose without regaining.
If pregnancy is a possibility, plan ahead. These medicines must not be used in pregnancy, fertility often improves as weight falls, and each medicine has specific guidance about contraception and stopping before trying to conceive. See Planning a pregnancy on weight loss medication.
Progress is more than a number
One last idea we use constantly in our clinic: do not hand the scales the only vote. Muscle weighs more than fat, so in a good week of strength work and protein your weight can hold still while your waist shrinks and your clothes fit differently. Track a few things that matter to you: energy, sleep, how far you can walk, a notch on a belt, playing with your kids or grandkids without thinking about it. Those are the results the research says these medicines can deliver when you give them the support they need.
How Well Revolution supports you
Every Well Revolution weight management plan includes a doctor's assessment, a personalised treatment plan, and unlimited care team support while you are on treatment. We help with the medication, and just as importantly with everything in this guide: protein targets, activity, side effects, plateaus, maintenance planning and dose reduction when you get there.
This article is general information, not personal medical advice. Your own dosing and treatment decisions always come from your prescriber.
Existing members: log in at member.wellrevolution.com and start a priority chat any time you need us.
New to Well Revolution? Start an online weight management assessment and one of our NZ-registered doctors will review whether treatment is right for you.
References
- Rubino F, et al. Definition and diagnostic criteria of clinical obesity. The Lancet Diabetes and Endocrinology. 2025;13(3):221-262. Link
- Wilding JPH, et al. Once-weekly semaglutide in adults with overweight or obesity (STEP 1). New England Journal of Medicine. 2021;384:989-1002. Link
- Wilding JPH, et al. Weight regain and cardiometabolic effects after withdrawal of semaglutide: the STEP 1 trial extension. Diabetes, Obesity and Metabolism. 2022;24(8):1553-1564. Link
- Jastreboff AM, et al. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1). New England Journal of Medicine. 2022;387:205-216. Link
- Aronne LJ, et al. Continued treatment with tirzepatide for maintenance of weight reduction in adults with obesity: the SURMOUNT-4 randomized clinical trial. JAMA. 2024;331(1):38-48. Link
- Horn DB, et al. Tirzepatide for maintenance of bodyweight reduction in people with obesity in the USA (SURMOUNT-MAINTAIN): a multicentre, double-blind, randomised, placebo-controlled trial. The Lancet. Published online 12 May 2026. Link
- American College of Lifestyle Medicine, American Society for Nutrition, Obesity Medicine Association, The Obesity Society. Nutritional priorities to support GLP-1 therapy for obesity: a joint advisory. American Journal of Clinical Nutrition. 2025. Link
- Look M, et al. Body composition changes during weight reduction with tirzepatide in the SURMOUNT-1 study of adults with obesity or overweight. Diabetes, Obesity and Metabolism. 2025. Link
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