The Big O!
Everyone's talking about it… possibly the worst-kept secret of the A-list crowd – Ozempic (or Mounjaro here in the UK). Unless you've been living under a rock, you've probably heard of one or both. These medications belong to a group known as GLP-1 receptor agonists (with Mounjaro also acting on another hormone called GIP) and have transformed the world of weight loss. These medications are given as weekly injections, with the dose gradually increased over time to help minimise side effects.
GLP-1s work by mimicking hormones naturally produced in the gut. They help regulate blood sugar by stimulating insulin release when blood glucose levels rise, while also slowing the rate at which food leaves the stomach and reducing appetite. The result? Many people feel fuller for longer and naturally eat less. They're not suitable for everyone. Pregnant or breastfeeding women, and people with certain medical conditions such as a history of pancreatitis or some thyroid disorders, are generally advised not to use them. This is why they should always be prescribed and monitored by a qualified healthcare professional.
In the UK, GLP-1s are now licensed for weight management for people who meet specific criteria. NHS guidance recommends their use alongside a structured programme of diet, physical activity and behavioural support for people living with obesity or overweight with weight-related health conditions. Although these medications have become easier to access through private providers, they shouldn't be viewed as a quick fix or simply a way to kick-start a diet. Research shows that many people regain some or all of the weight they've lost once they stop treatment, particularly if healthy lifestyle habits haven't been established alongside the medication.
That's why nutrition and exercise remain just as important.
The good news is that our bodies naturally produce GLP-1 hormones too. While food won't replicate the effects of medication, eating enough protein, soluble fibre and healthy fats can support fullness, help regulate blood sugar and make it easier to manage appetite throughout the day. Ultimately, weight management still comes down to creating a calorie deficit; using more energy than we consume. That sounds simple on paper, but anyone who's tried to lose weight knows it's rarely easy. Our environment often encourages high-calorie eating and long periods of sitting, making healthy choices harder than they should be.
The best evidence shows that successful weight loss comes from combining a nutritious, calorie-controlled diet with regular physical activity. Rather than overhauling everything overnight, focus on making small, sustainable changes. Swap foods instead of banning them completely, add an extra serving of vegetables, take a daily walk or build up your exercise gradually if you're just starting out.
Small changes repeated consistently are far more powerful than drastic changes that only last a few weeks.
The Bottom Line is, GLP-1s are an exciting and effective treatment option that can make weight loss more achievable for many people. But they're a tool, not a cure. Lasting success comes from combining medication, where appropriate, with healthier eating habits, regular movement and realistic lifestyle changes that you can maintain for years, not just weeks. There is no magic injection for lifelong health. The goal isn't simply losing weight, it's building habits that help you keep it off and improve your health in the long term.
