Learn from our medical team about the differences between our available weight loss treatments
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Each medication works differently. Explore our comparative guide of available treatments to find the best fit for you.
Answer a few questions about your weight loss goals and our team will recommend the most effective plan for you.
Get clear on what works best, who it's for, and how to access it safely in the UK.
In the UK, there are three weight loss injections approved for obesity treatment: Mounjaro, Wegovy, and Saxenda.
What about Ozempic?
Ozempic isn’t approved for weight loss in the UK—it’s licensed for diabetes. However, Wegovy contains the exact same active ingredient (semaglutide) and is made by the same manufacturer.
How do they work?
All three injections act on the GLP-1 receptor, a hormone that helps regulate appetite and blood sugar levels. Mounjaro goes a step further, also targeting the GIP receptor, which plays a role in metabolism. This dual action makes Mounjaro the most effective weight loss injection available.
Mounjaro’s dual action on both GLP-1 and GIP receptors makes it more effective for weight loss compared to Wegovy and Saxenda, according to studies. That said, both medications are highly effective when combined with healthy lifestyle changes.
In a clinical trial of 2,539 adults, those taking 15mg of Mounjaro for 72 weeks lost an average of 20.9% of their body weight. For Wegovy, research shows an average weight loss of 14.9% after 68 weeks on 2.4mg.
Both options offer significant results—it’s about finding the right fit for your journey.
Since Mounjaro and Wegovy target similar receptors, their side effect profiles are largely the same.
Side effects are common with both medications, but they are typically mild and resolve as the body adjusts. The most frequently reported adverse effects include:
These symptoms occur in more than 1 in 10 patients and are most prevalent during the initial weeks of treatment. If you have concerns about side effects or their management, Voy’s clinical team is available to provide guidance and support.
Doctor-approved plans based on your goals and medical history, delivered very month.
Unlimited access to clinicians for no extra cost. On-demand support with side effects and dosages.
Build habits that lead to lasting, positive changes in your life. Always have someone in your corner.
Learn to take your medication, improve your nutrition and track your progress through our app portal.
"Before Voy, I felt stuck in a cycle of failed diets and fading motivation. I kept trying, but nothing lasted — and I was losing confidence fast. With Voy, everything felt different. The medication, the app, the check-ins with my coach — it gave me the structure I needed to finally make it stick. I’ve lost 35kg, feel stronger, more energised, and for the first time in years, genuinely proud of myself."
"I used to avoid mirrors, social events, even dinners out. My self-esteem was at rock bottom — until I found Voy. This time, it wasn’t just another diet. With coaching, medication, and real support, I lost 21kg, started going to the gym, and finally started loving the woman I saw in the mirror. For the first time in years, I feel proud, strong, and in control of my life again."
"I knew I needed more than just willpower. Voy gave me the full package – expert care, a dedicated clinician, a plan that actually fits real life. With their support and gradual medication, I lost 22kg in under a year. I went from breathless and sluggish to kickboxing again after 20 years. Voy helped me rebuild my confidence, my habits, and my energy. I’ve never felt stronger."
"After decades of trying every diet, Voy was the first thing that actually worked. I started seeing results in the first month, but it was the steady, supported progress that changed everything. With expert guidance, regular coaching and medication tailored to me, I’ve lost 24kg – and gained my energy, confidence and freedom back. At 59, I feel healthier than I have in decades."
"Before Voy, my weight felt out of control — and so did my confidence. I’d tried every diet out there, but nothing ever stuck. With Voy, everything changed. The coaching, structure and medication helped me rebuild my habits and lose 8 stone. I’ve gone from a size 26 to a 16, but more than that, I’ve become the version of myself I always wanted to be — confident, present, and proud."
"Before Voy, I felt stuck — low energy, low mood, and no idea where to start. The medication helped quiet the cravings, but it was the support and structure that made it all work. With Voy, I lost 20kg in six months, started enjoying food without guilt, and finally feel like myself again — confident, happy, and in control."
"I was stuck in a loop — try a diet, lose a few pounds, gain it all back. But Voy felt different from day one. The support was there when I needed it, the guidance was clear, and the results came steadily. Eight months in, I’m 25kg down and finally free from the binge-restrict cycle. I’ve found balance, confidence, and a future I’m excited about."
Month 1-3
As your medication takes effect, you'll notice a natural reduction in appetite.
Month 3-6
With continued weight loss, your coach will guide you in building sustainable habits.
Month 6-12+
Your medication dosage will plateau as your coach works with you to maintain results.
¹https://www.nejm.org/doi/full/10.1056/NEJMoa2206038
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