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Weight Loss Injections What You Need to Know Before and During Treatment

24/2/2026

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Weight Loss Injections What You Need to Know
Weight loss injections such as Ozempic, Wegovy and Mounjaro are becoming increasingly common. If you are using them, or considering them, I want to begin by saying this clearly.
I am not here to judge you.

You will have thought long and hard about this decision. Many people who choose these medications have struggled for years. Some have tried every diet. Some are exhausted. Some feel desperate. I understand that.

However, if you are using these injections, there are some very important things you need to be aware of.
Over the past year I have seen a growing number of clients six to twelve months into weightloss treatment who are experiencing significant nutritional and metabolic consequences. In some cases I have had to work quite intensively to repair what has been lost.
This article is not about fear. It is about safety and long term health.

How Weight Loss Injections Work
These medications reduce appetite dramatically. That is their primary mechanism. When appetite drops, calorie intake drops. When calorie intake drops significantly, weight falls.
But lowering appetite to very low levels can tip into something else.  For many people, it effectively becomes a state of semi-starvation.
The body is designed to survive. If it does not receive adequate protein, vitamins and minerals from food, it will source them internally... And that is where problems begin.

The Body Will Break Down Tissue To Survive

When intake is too low, the body does not just burn fat.  It breaks down muscle tissue.
Muscle is metabolically active tissue. It contains amino acids that the body needs for immune function, hormone production, detoxification, neurotransmitter synthesis and repair.

I have seen individuals lose significant lean muscle mass rather than primarily fat mass. This weakens metabolic rate over time and makes long term weight maintenance harder.

Protein is not optional. It is fundamental to life.  Without adequate protein, the body cannot:
  • Produce enzymes
  • Repair tissue
  • Maintain muscle
  • Support immunity
  • Balance blood sugar
  • Support cognitive function
When protein intake collapses because appetite has disappeared, the consequences can be serious.

Nutrient Depletion Is Real
I have seen:
  • Iron deficiency anaemia
  • Low B12
  • Low folate
  • Low zinc
  • Low magnesium
  • Low albumin
  • Low total protein
  • Reactive hypoglycaemia
  • Malnutrition across multiple markers

One client developed profound cognitive decline that mimicked early dementia. It was driven by nutrient depletion and blood sugar instability. In her case, the damage appears to be irreversible.

This is not common, but it is possible.

When people are eating very little, they are not simply eating less cake. They are often eating less of everything.
That includes iron, B vitamins, essential fatty acids, choline, iodine, selenium, magnesium and amino acids.
If appetite is low, nutrient density must go up.

At The Very Least Consider Foundational Supplementation
If appetite is significantly reduced, food volume falls. When food volume falls, micronutrient intake almost always falls with it.  Even with the best intentions, it can be very difficult to obtain adequate iron, B vitamins, magnesium, zinc, selenium, iodine and trace minerals from very small meals.

At the very least, I would recommend that anyone using weight loss injections considers:
  • A high quality multi nutrient daily
  • An omega three capsule daily

A comprehensive multi nutrient can help cover baseline requirements for:
  • B12 and folate for red blood cell production and neurological function
  • Iron support where appropriate
  • Zinc for immune health and tissue repair
  • Magnesium for muscle and nervous system function
  • Selenium and iodine for thyroid support
  • Vitamin A, C and E for antioxidant protection

Omega three fatty acids are particularly important as intake of oily fish often drops when appetite is low. Omega three supports:
  • Brain health
  • Mood regulation
  • Inflammation balance
  • Cardiovascular health
  • Cell membrane integrity
These are not optional extras, they are foundational.
Supplementation does not replace food, but when intake is reduced, it can act as a safety net.
​
Ideally, supplementation should be guided by blood testing rather than guesswork, especially if you are experiencing fatigue, dizziness, hair thinning, brittle nails, brain fog or mood changes.
If you are choosing to use appetite suppressing medication, nutritional support must run alongside it. The body still requires nutrients, even if hunger has been silenced.


Protein Is Critical For Long Term Weight Loss
Ironically, adequate protein actually supports weight loss in a healthy way.
Protein:
  • Increases satiety
  • Supports muscle mass
  • Maintains metabolic rate
  • Stabilises blood sugar
  • Reduces cravings
  • Supports thyroid function
  • Helps preserve lean mass during fat loss
For most adults aiming to protect muscle during weight loss, a rough guide is at least 1.2 to 1.6 grams of protein per kilogram of body weight per day, depending on individual context.
If appetite is suppressed, this has to be intentional, you need to make yourself do it!

How To Structure Food Intake When You Have No Appetite
If you are on these injections, do not rely on hunger signals.  Instead, structure your day.
Aim for three intentional eating opportunities, even if portions are small.

At each one, prioritise:
  • Protein
  • Colourful vegetables
  • Healthy fats
  • Minerals
Even if the meal is small, it must be dense.

Simple Daily Structure
Morning
Protein smoothie or eggs
Add healthy fats
Add micronutrients (fruit/ veggies/ nuts and seeds)

Midday
Protein source such as chicken, fish, tofu or lentils
Two to three vegetables
Olive oil or avocado

Evening
Smaller protein portion
Steamed vegetables
Complex carbohydrate if tolerated

If appetite is extremely low, liquids are often easier.

High Nutrient Smoothie Ideas Using Water

Example one
  • Water
  • Clean protein powder
  • Handful of spinach for folate and magnesium
  • Frozen berries for vitamin C and polyphenols
  • Ground flaxseed for omega three
  • A spoon of almond butter for vitamin E and healthy fats
Example two
  • Water
  • Protein powder
  • Cooked and cooled courgette for fibre and potassium
  • Half an avocado for healthy fats and potassium
  • Cacao for magnesium and polyphenols
  • Chia seeds for fibre and omega three
Example three
  • Water
  • Protein powder
  • Cooked carrot for beta carotene
  • Beetroot for nitrates and folate
  • Ginger for digestive support
  • Pumpkin seeds blended for zinc and iron
These are not meal replacements.

Key Nutrients To Protect
  • Iron for oxygen transport
  • B12 for nerve health and cognition
  • Folate for DNA repair and red blood cell production
  • Zinc for immunity and tissue repair
  • Magnesium for muscle and nervous system stability
  • Selenium for thyroid function
  • Choline for liver health
  • Iodine for thyroid regulation
  • Omega three fats for brain and anti inflammatory support

Blood Sugar Stability Still Matters
Even on these medications, blood sugar can drop if meals are skipped.  Low blood sugar can cause:
  • Dizziness
  • Weakness
  • Shaking
  • Irritability
  • Brain fog
  • Palpitations
Do not ignore this. Even small amounts of protein and fibre can stabilise glucose levels.

What Happens When The Injections Stop
This is the most important part. These medications do not teach you how to eat well, they just supress your appetite.
If eating habits are not rebuilt during treatment, when the medication stops, your appetite returns but your metabolic rate may be lower due to muscle loss.  That is when rapid weight regain occurs.
If you use these injections, use the time wisely.

Learn how to:
  • Prioritise protein
  • Balance meals
  • Include vegetables daily
  • Stabilise blood sugar
  • Understand portion size
  • Listen to true hunger versus emotional hunger
The goal should never be lifelong starvation, the goal should be metabolic resilience.

My Position
If you are using weight loss injections, I will support you, but I will also monitor:
  • Muscle mass
  • Protein status
  • Iron markers
  • B vitamins
  • Electrolytes
  • Healthy fats
  • Liver function
  • Thyroid markers
  • Blood sugar control
I have seen what happens when nutrition is ignored during appetite suppression.  With the right support, these medications can be used more safely whereas without structure, they can leave people weaker than when they started.
This is not about being a killjoy, It is about protecting your long term health.
If you are using these injections and would like your nutrition and blood markers monitored properly, you are welcome to book in for a review.
Your health is more than the number on the scales.
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​Eve Morley NT
NNA. mGNC. Soc Nat. NAP
​​[email protected]

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