09/12/2025
GLP-1: What Is It And Why Is Everyone Talking About It?
Everywhere I go at the moment someone whispers to me about “that weight loss jab”.
“Simon, what do you think of GLP-1?”
“Is it safe?”
“Is it cheating?”
So I thought it was time to sit down and actually talk about it properly, without the drama.
What on earth is GLP-1?
GLP-1 is not some alien chemical cooked up in a lab. It is a hormone your own body already makes. Its main jobs are to help control appetite, slow digestion, balance blood sugar and tell your brain, “Mate, you have had enough now.”
Drug companies have created medicines that mimic this hormone. You will have seen names like liraglutide, semaglutide and tirzepatide floating around. They were first used for type 2 diabetes. Then researchers noticed something big. People were losing a serious amount of weight, and their heart and kidney risk markers were improving as well.
So this is not just about jeans fitting better. It is about health.
Who has actually approved it?
This is not some influencer trend. The big global bodies are now weighing in.
In December 2025, the World Health Organization released its first global guideline on GLP-1 therapies for obesity. It gives a conditional recommendation for using GLP-1 medicines like semaglutide and liraglutide as long term treatment for obesity in adults, as long as they are combined with intensive lifestyle and behavioural support, not used on their own.
Large trials have shown things like:
Meaningful, sustained weight loss when GLP-1 medicines are used alongside diet and exercise
Fewer major cardiovascular events, such as heart attack, stroke and cardiovascular death, in high risk people with obesity and existing heart disease, even when they do not have diabetes
Promising reductions in kidney events and slower decline in kidney function in people with diabetes or obesity in several trials and pooled analyses
So no, this is not a fad. It has moved into mainstream medicine, with the usual scientific caution around cost, access and long term data.
Can you get GLP-1 in New Zealand?
Yes, you can, but the details really matter.
In New Zealand right now:
Semaglutide is approved as Ozempic for type 2 diabetes
Medsafe has also approved semaglutide as Wegovy for weight loss in people with obesity
Wegovy is not funded by Pharmac for weight loss, so people who use it for obesity currently pay privately, and the monthly cost puts it out of reach for many
You will see more clinics and pharmacy based weight management services in New Zealand offering GLP-1 medicines under prescription as part of their programmes. The important bit is that the medicine must be prescribed and monitored by an authorised prescriber, and it should sit inside a proper health plan, not as a quick “jab and hope for the best”.
These medicines work best when they are wrapped in proper support. That means things like:
Hitting a decent protein target
Doing strength training to protect muscle
Slowing down the way you eat and live, not just shrinking portions
If you do not protect your muscle, you can lose too much of it along with the fat, which can make you weaker and knock your metabolism around. That is the bit almost no one on social media talks about, but it is showing up clearly in the body composition studies.
Where the 4 Wheels of Health fits in
Kylie and I have been getting questions about GLP-1 from people on our 4 Wheels of Health programme. Some are already on these meds, others are thinking about it and feel a bit lost in the noise.
We have now added a full GLP-1 Support section to our automated course, because the questions were coming. People want to understand how to use these medicines safely, how to keep muscle while losing fat, and how to navigate side effects without feeling miserable.
Just to be very clear:
We do not supply the medication
We do not prescribe it
We do not get a clip of the ticket if someone goes on it
What we do is help people understand how to live well around it. Inside the course we cover things like:
How GLP-1 actually works in your body, in plain English
Why protein and strength work become non negotiable if you are using it
How to protect your muscle, energy and everyday functioning while the weight is coming off
How to adjust your eating patterns so the jab is a tool, not the whole strategy
What the latest research is saying about long term outcomes and why lifestyle still matters
Think of it like this. The medication is the car. We are just trying to hand you a decent driver’s manual so you do not bin it on the first corner.
Why Kylie and I care about this
New Zealand has a massive load of metabolic disease. Diabetes, heart disease and kidney problems are hitting a lot of families. GLP-1 medicines give some people a genuine chance to change direction. The international data on weight loss, heart health and kidney outcomes is promising and getting stronger, but it is not magic, and it is not perfect.
I have cooked for enough people and talked to enough doctors to know this: a medicine is not a lifestyle. Just like buying a gym membership does not magically get you fit. You still have to show up.
Used well, GLP-1 can be a powerful reset button. Used badly, it can create new problems and leave you tired, weaker and confused, especially if muscle and nutrition are ignored.
Kylie and my goal is simply to help people understand the science, the risks and the habits that make these medications safe and effective. If you are thinking about GLP-1, start with a proper chat with your GP or specialist. And if you are already on it and want some structure around what you eat and how you move, that is exactly why we built the GLP-1 section into our course.
No hype. Just tools to help you look after yourself.
Simon Gault