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If you’ve read Part 1, you’ll know this isn’t about fear-mongering or judgement. It’s about making informed decisions with your eyes open.
So, what does the research actually say?
These injections - Ozempic, Wegovy, Saxenda are GLP-1 receptor agonists. Originally designed for managing type 2 diabetes, they’re now prescribed for general weight loss. They work by slowing digestion and reducing appetite, which means people eat less and feel fuller for longer.
And yes, the clinical trials show results. On average, people lost around 15% of their body weight over a year.
That sounds impressive.
But here’s what doesn’t make the headlines.
Follow-up studies show that 30–40% of that weight loss comes from lean mass.
That includes water, but also muscle.
And that matters because muscle mass is one of your greatest assets.
It protects your metabolism, improves recovery, supports strength, and reduces your risk of regaining weight.
Without it, everything becomes harder and weight comes back faster.
So while the scale might go down, that doesn’t always mean your health is going up.
Let’s compare that to what we see at Function Fitness.
Someone starting at 100kg might lose 4kg over the first 3 months with regular training (around three times a week), small but consistent changes to nutrition, and real support. That’s a 4% reduction not dramatic, but it’s sustainable.
If that continues across the year, that’s 16% total weight loss right in line with the injections.
But here’s the difference:
We work to preserve or even build muscle during that process.
That means a healthier body composition, more energy, better recovery, and the tools to maintain those results long term.
With injections, up to 40% of what’s lost might be muscle. With coaching and training? We aim to keep it.
Let me be really clear.
I’m not against them.
Used in the right context, these injections can be a helpful starting point for someone who feels stuck. They can provide a psychological win and some physical momentum.
But they’re not the answer.
Because without the habits, you’ll end up right back where you started — only with less muscle, less resilience, and more frustration.
At some point, the habits have to come in.
And here’s something that really doesn’t sit right with me:
You have to be a certain BMI to qualify for these medications.
In other words, you have to get “unhealthy enough” to earn the shortcut.
Wouldn’t it be better to teach the habits first?
To equip people with the tools to eat well, move more, and build strength before even needing medication?
We don’t fully know the long-term implications of these injections for people without diabetes.
What happens to insulin sensitivity long-term?
Could the body become dependent on these meds for blood sugar regulation?
How does it affect metabolism in the long run?
We don’t know. And that’s worth pausing over.
If you’ve made it through both parts… thank you!
No, this isn’t about quick fixes.
But it is about taking ownership of your health and learning to build something sustainable.
If you're interested in seeing what that looks like, without injecting yourself, shoot me an email. I’ll send you some real results.
It’s half the cost. And it actually lasts.
Charlie
Charlie@functionfitness.co.uk
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