GLP-1 Dietitian Perth | Nutrition Support During & After GLP-1 Treatment
Beyond the scale
Because eating less doesn’t mean your body needs less.
GLP-1 medications (Ozempic®, Wegovy®, Mounjaro®) can change how you eat.
Appetite drops.
You feel full quickly.
Sometimes, food just doesn’t appeal.
That can help with weight loss.
But it also creates a new challenge:
how to nourish your body when eating feels harder
What matters is not just weight loss — but how you lose it
The missing piece in GLP-1 care
"My role is not to prescribe or promote GLP-1 medications. It is to support the nutrition side of care — which is often the missing piece. Medication decisions should always be discussed with your prescribing healthcare professional"
Dr Shy Vishnumohan, PhD APD
Accredited Practising Dietitian
What I assess when you are using a GLP-1 medication
If you’re using a GLP-1 medication such as Wegovy, Mounjaro or Ozempic, your appetite and the amount of food you can comfortably eat may change quite a lot.
You may feel full sooner, think about food less, skip meals without meaning to, or find that foods you used to eat easily suddenly feel like too much.
That can be helpful for weight management, but eating less does not mean your body suddenly needs less nutrition.This is the part I pay close attention to.
Rather than giving everyone a standard “GLP-1 diet”, I look at what has actually changed for you.
Are you eating enough across the day?
Sometimes appetite suppression becomes so strong that meals become very small or are skipped altogether.
I look at whether your current intake is still supporting your energy, concentration, strength, health and day-to-day function.
Are you getting enough protein?
When weight is changing, I am not only interested in the number on the scales.I also want to think about the tissue we are trying to keep.Protein intake, how it is distributed across the day, your overall food intake and your strength all become important parts of the picture.
Are side effects changing the way you eat?
Nausea, reflux, constipation, diarrhoea, early fullness or food aversions can all change what, when and how much you are able to eat.Sometimes the nutrition plan needs to change so that eating remains comfortable while you still get what your body needs.
Are important foods quietly disappearing?
When portions become smaller, food variety can shrink too.I look at whether you are still getting enough fibre, fluids and nutrient-rich foods, and whether there are any gaps that are particularly relevant to your health, medications, life stage or usual way of eating.
What is happening to your strength and everyday movement?
The scales only tell us part of the story.
Where appropriate, I also look at strength, movement and ways to support lean mass rather than focusing only on making the number on the scales smaller.
And what happens when things change again?
Your dose may change. Your appetite may change. Weight loss may slow. Or you and your medical team may eventually decide to reduce or stop the medication.
Your nutrition plan needs to be able to move with you through those changes too.
My aim is not to make food another job.
It is to help you stay well nourished while the medication is doing its job, and build an eating pattern that still makes sense when your appetite changes again.
About the author
Written and clinically reviewed by Dr Shy Vishnumohan, PhD, APD
Food Scientist and Accredited Practising Dietitian
Dr Shy provides individualised GLP-1 nutrition support in Perth and via telehealth for people using medications including Wegovy, Mounjaro and Ozempic.
Her approach is practical, evidence-informed and tailored to the person rather than based on a standard GLP-1 meal plan.
Last reviewed: September 2026
When this kind of support matters
This may be helpful if:
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you’ve recently started GLP-1
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you’re reducing the dose or coming off GLP-1 medication
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you’re struggling to eat enough
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food feels unappealing or inconsistent
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you’re experiencing nausea, reflux or constipation
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you’re concerned about muscle loss or fatigue
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you feel unsure how much to eat now that the medication is changing or stopping
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you’re worried about appetite returning or weight regain after stopping
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you want a more sustainable, supported approach
Coming off GLP-1 medication? Support does not end when the prescription changes. I also help patients who are reducing or stopping GLP-1 medication navigate appetite changes, meal structure, protein needs, bowel comfort, and the shift into maintenance with more clarity and less fear.
Not sure if you’re eating enough on GLP-1?
When appetite drops, it isn’t always obvious whether you’re simply eating less — or whether protein, fluids, food variety and day-to-day energy are beginning to slip. Download Dr Shy’s free GLP-1 Nutrition Check.
You’ll also receive occasional evidence-based GLP-1 nutrition notes from Dr Shy. Unsubscribe anytime.
AS SEEN IN THE MEDIA
GLP-1 Nutrition in the media
Dr Shy is regularly invited to translate the Science around GLP-1 medicines, nutrition and weight management for the public
