Starting a GLP-1 programme in the UK begins with a proper assessment, not a purchase. The medication is only part of the picture, and it works best with a plan built around it. This article covers how to begin, whether GLP-1 is available on the NHS, how it relates to Mounjaro, and who it is not suitable for.
How do you start a GLP-1 programme in the UK?
You start a GLP-1 programme in the UK with an assessment by a prescriber, then a plan built around the medication.
The first step is an assessment with a prescriber, who looks at your weight, your health and your history to decide whether the medication is suitable for you. If it is, the medication is the beginning, not the whole answer. The mistake many people make is getting the medication from an online pharmacy on its own. The drug arrives, you lose weight, and then what?
A good programme puts support around the medication. At Mission we call it MNT: a clear Mission, or goal, the Nutrition to go with it, and Training to protect your muscle, with the medication professionally managed and adjusted as you go. We start by understanding your life, your job, your budget and what you will actually keep doing, then agree a realistic first goal. You can see how that works on our glp-1 weight loss programme.
Always begin with a prescriber, and never buy the medication to use on your own without support. Results vary from person to person.
Which GLP-1 programme is best for weight loss?
The best GLP-1 programme for weight loss is one that pairs the medication with real support, not the medication alone.
There is no single programme that suits everyone, because we all have different jobs, families, budgets and starting points. The right one for you is the one that fits your life and that you will keep doing. What they have in common is that they do more than hand you a prescription. Look for a clear, realistic goal, nutrition support to build better eating habits, training to protect your muscle, the medication managed properly by a professional, and regular check-ins so someone helps you stay on track. That combination is what our programme is built around. Agree the right approach for you with your prescriber and coach.
Is GLP-1 approved by the NHS?
Yes, some GLP-1 medicines are approved for weight loss on the NHS, but access is limited.
NICE has approved semaglutide (Wegovy) in 2023 and tirzepatide (Mounjaro) in 2024 for managing overweight and obesity. How you can get them differs. Wegovy is only available through specialist weight management services, not through your GP. Tirzepatide is being introduced through GPs from April 2026, but in a phased way over several years, starting with the people in greatest clinical need, those with a higher BMI alongside weight-related health conditions, and not every GP practice takes part.
One detail is worth knowing. The NHS requires anyone prescribed tirzepatide to take part in a "wrap-around" support service covering diet, nutrition and activity. In other words, the NHS has built in the same principle we work to: the medication does better with a programme around it. If you are not eligible on the NHS, or you face a long wait, a private programme is an alternative. Check your options with a prescriber.
Is GLP-1 the same as Mounjaro?
No, GLP-1 is a group of medicines, and Mounjaro is one of them.
"GLP-1" refers to medicines that act on the GLP-1 hormone your body releases after a meal, the one that tells you that you are full and slows digestion down. Wegovy, whose active ingredient is semaglutide, is one of them. Mounjaro, whose active ingredient is tirzepatide, works on the GLP-1 pathway and adds a second hormone called GIP, so it is sometimes described as a dual agonist rather than a pure GLP-1, though it is usually grouped with them. In short, Mounjaro is a weight-loss medication in the same family, not a different thing. Which one is right for you, if any, is a decision for your prescriber.
Who cannot take GLP-1?
Not everyone can take GLP-1 medication, and a prescriber decides based on your health.
Because it is a prescription-only medicine, whether it is safe for you is assessed by a prescriber, who checks your weight, your medical history and any other medicines you take. As a general guide, it is not suitable during pregnancy, while breastfeeding or when you are trying to conceive, and it is not prescribed to under-18s for weight loss outside specialist care. People with certain medical histories may be advised against it. This is exactly why you cannot simply buy it to use on your own: the assessment is there to keep you safe. If you are unsure, speak to a prescriber.
Simon Hill is Chief Executive of GLP-1 company Mission MNT, founder of the Hartfield Healthcare Group and author of The Rebound Effect, published by Rethink Press in January 2027, on why weight loss on GLP-1 medication so often doesn't last and what actually keeps it off.
Medically reviewed by Callum Jones (HCPC DT035272). Registered Dietitian with a Foundation Degree in Sport Development, BSc in Nutrition and PG Diploma in Dietetics, complemented by qualifications in Personal Training and Exercise Referral. Brings experience working within professional rugby, combining clinical dietetic expertise with practical exercise and training experience. Provides an integrated approach to nutrition, weight management, physical activity and long-term health, supporting individuals to make sustainable lifestyle changes.
Published: 02.10.2026 Next review: 02.10.2027
Sources
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NICE (2023) Semaglutide for managing overweight and obesity. NICE technology appraisal (TA number to confirm).
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NICE (2024) Tirzepatide for managing overweight and obesity. NICE technology appraisal (TA number to confirm).
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NHS England (2026) Phased rollout of tirzepatide for weight management through primary care from 1 April 2026, including mandatory wrap-around care (diet, nutrition and physical activity). Details and eligibility cohorts via NHS England / local ICB policy.
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