Why Protein is Essential During Medical Weight Loss

If you’ve started a clinically-supervised weight loss journey with us, you’ve likely noticed the 'quieting' of food noise. While our medical treatments are game-changers, they come with a new set of rules for your plate...

The most common question we get in the clinic is: "I’m hardly hungry, so what should I be eating?"

The answer is simple, but vital: Protein.

The "Muscle Gap": Why Protein Matters

When you lose weight rapidly on a GLP-1, your body doesn't just burn fat—it can also burn muscle. Research suggests that without the right nutrition, up to 40% of the weight lost can come from lean muscle mass.

Losing muscle is bad news for your metabolism. Muscle is "metabolically active," meaning it burns calories even while you sleep. To keep your metabolism firing and ensure you achieve a "toned" rather than "depleted" look, you must protect your muscle.

The Magic Number: How Much Do You Need?

While the standard UK guideline for a sedentary adult is roughly 0.75g of protein per kg of body weight, this is not enough when you are on a medical weight loss programme.

To protect your muscle and keep your hair and skin healthy during weight loss, we recommend aiming for:

1.2g to 1.6g of protein per kilogram of your target body weight.

Example: If your goal weight is 70kg (approx. 11 stone), you should aim for 84g to 112g of protein every single day.

3 Pro-Tips for Hitting Your Target

When your appetite is low, eating 100g of protein can feel like a chore. Here is how our most successful clients do it:

1. The "Protein First" Rule

Always eat your protein source first. If you fill up on salad or potatoes, you won't have room for the chicken, fish, or tofu. By eating your protein first, you ensure your body gets the most critical nutrients before you feel full.

2. High-Protein "Cheats"

You don’t have to live on plain chicken breasts. Try these easy swaps:

• Greek Yoghurt: A bowl of Fage 0% yoghurt can pack 20g of protein.

• Liquid Gold: If you can’t face a meal, a high-quality whey or vegan protein shake is a lifesaver.

  
  

• Eggs: Boiled eggs are the perfect portable snack for busy days.

  
  

3. Consistency Over Intensity

Your body can only process about 25–30g of protein at a time for muscle repair. Instead of one massive steak, try to "pulse" your protein: 25g at breakfast, 25g at lunch, and 25g at dinner.

Expert Support at Brook Aesthetics

At Brook Aesthetics, we don’t just "prescribe and wave goodbye." Our weight loss programmes are built on medical safety and long-term results. We monitor your body composition to ensure you are losing fat, not strength.

Ready to start your journey or need a review of your current plan?

Book a free 15 minute consultation in our private clinic in Lisburn, for a comprehensive consultation. We’ll help you calculate your specific macros and keep you on track for the healthiest version of you.