How a nutritionist can support people taking Ozempic or Mounjaro

First, let me say this clearly: being overweight or obese is not your fault. Obesity is now recognised as a chronic, complex disease, not a failure of willpower. That is why advice such as “try harder, eat less, and exercise more” is not only outdated but also misleading. It fails to acknowledge the powerful hormonal, metabolic, behavioural, and environmental factors that drive weight gain and make long-term weight loss so challenging.

For many of my clients, those sentences alone bring relief. After years of dieting, blame, and frustration, starting a GLP-1 medication such as Ozempic or Mounjaro can feel like both hope and fear rolled into one. Hope that something will finally work. Fear that it will not last.

Medications like semaglutide (Wegovy) and tirzepatide (Mounjaro) mimic gut hormones that regulate appetite, slow gastric emptying, and improve blood sugar control. Large clinical trials show that semaglutide can lead to around 15 to 17% weight loss over 68 weeks when combined with lifestyle support (Ref. 1). Tirzepatide has demonstrated even greater average reductions of 20% or more of the starting weight (Ref. 2). These results represent a highly significant shift in the medical treatment of obesity.

But medication alone is not the full picture. This is where a nutritionist plays a crucial role.

The first few months on a GLP-1 medication are a metabolic adjustment phase. Appetite may drop quickly. Nausea, bloating, constipation, or fatigue are common. Gradual dose escalation has been shown to reduce gastrointestinal side effects and improve adherence (Ref. 3).

During this time, many clients eat far less than usual. While this may sound positive, undereating protein and essential nutrients can lead to muscle loss, low energy, and hair thinning.

How a nutritionist can provide support

Having a nutritionist by your side can help you navigate this journey with clarity and confidence by supporting:

Meal planning that supports GLP-1 medications

Food first approach. Always. A nutritionist can help you:

• plan smaller, nutrient-dense meals that match your reduced appetite
• prioritise adequate protein to preserve lean mass
• balance fibre intake to support digestion without worsening bloating
• stay hydrated and stabilise electrolytes

Preserving muscle and metabolic health

Rapid weight loss without structure often results in loss of lean mass. This can slow metabolic rate and increase the risk of weight regain later. Research consistently shows that higher protein intake supports satiety and helps preserve lean tissue during energy restriction (Ref. 4).

A nutritionist designs a plan that protects your metabolism while the medication reduces appetite. That means structured meals, adequate protein, and resistance training guidance where appropriate. The goal is fat loss, not simply weight loss.

Managing side effects with strategy

Nausea and reflux are not random. They are often influenced by portion size, fat intake, meal timing, and food texture. Instead of guessing, we adjust strategically.

For example:

• eating slowly and stopping at comfortable fullness
• choosing lighter cooked meals rather than large raw salads early on
• spacing fluids away from large meals
• introducing fibre gradually

These practical changes reduce discomfort and improve consistency. And consistency is what drives results.

Addressing emotional eating and food guilt

Many clients tell me something surprising. Even when their appetite is lower, emotional eating patterns can still show up. Stress, habit, and long-standing beliefs about food do not always disappear with an injection. And this is where NLP behaviour coaching comes in handy.

As outlined in my work supporting GLP-1 clients, combining medication with personalised nutrition and habit change support enhances long-term outcomes. Medication changes biology. Coaching changes behaviour.

Preventing weight regain after medication

One of the biggest fears is weight regain after stopping treatment. That fear is valid. Research shows that discontinuation of semaglutide is associated with significant weight regain if lifestyle changes are not firmly established (Ref. 5).

This is why I describe GLP-1 medications as a bridge, not something you rely on forever. For some people, however, longer-term use may be the right choice, and that decision should always be made in partnership with their doctor.

A nutritionist helps you build habits while your appetite is quieter. We work on:

• understanding hunger and fullness cues
• planning balanced meals for busy workdays
• navigating restaurants and travel
• building strength and movement routines
• reframing your relationship with food

By the time medication is reduced or stopped, you are not starting from zero. You have nutrition skills.

Looking beyond the scale

GLP-1 medications also improve cardiometabolic health markers. In people with type 2 diabetes at high cardiovascular risk, semaglutide reduced major adverse cardiovascular events (Ref. 6).

As a nutritionist and functional medicine practitioner, my role is to optimise these broader outcomes. Blood sugar regulation, lipid balance, gut health, thyroid function, stress resilience. Weight loss is one piece of a bigger health puzzle.

A personalised, compassionate approach

An approach combining evidence-based nutrition, behaviour change strategies, and functional testing, where appropriate, can support people navigating GLP-1 medications, helping them manage side effects, rebuild confidence, and prepare for life beyond injectables.

The tone is never blaming. Never shame. You are not weak. You are not lazy. You are dealing with a complex metabolic condition influenced by hormones, environment, stress, and life stage.

GLP-1 (and other newly emerging weight-loss medications) can certainly help regulate appetite. But only habit change builds resilience. When we combine the two thoughtfully, the results are powerful.

If you are taking Ozempic or Mounjaro, or considering starting, know this. You do not have to figure it out alone. With the right nutritional strategy, this chapter can become a turning point rather than just another attempt. Health is wealth. Always.

Disclaimer:

This article is for educational purposes only. I am not a medical doctor and do not prescribe weight loss medications. Always consult your GP, prescribing clinician, or a qualified healthcare professional experienced in GLP-1 therapies before making dietary changes or combining supplements with medication.

References

1. Wilding JPH et al., 2021. Semaglutide and weight loss in adults with obesity. New England Journal of Medicine> https://www.nejm.org/doi/full/10.1056/NEJMoa2032183

2. Jastreboff AM et al., 2022. Tirzepatide for obesity treatment. New England Journal of Medicine> https://www.nejm.org/doi/full/10.1056/NEJMoa2206038

3.Kapitza C et al., 2020. Semaglutide dose escalation and gastrointestinal tolerability. Diabetes, Obesity and Metabolism> https://doi.org/10.1111/dom.14040

4. Leidy HJ et al., 2012. The role of protein in weight loss and maintenance. American Journal of Clinical Nutrition> https://pubmed.ncbi.nlm.nih.gov/22037062/

5. Rubino D et al., 2022. Weight regain after stopping semaglutide. Diabetes, Obesity and Metabolism> https://pubmed.ncbi.nlm.nih.gov/35441470/

6. Marso SP et al., 2016. Semaglutide and cardiovascular outcomes in type 2 diabetes. New England Journal of Medicine> https://www.nejm.org/doi/full/10.1056/NEJMoa1607141