Non-surgical weight loss treatments designed by UK experts
Your target weight could be closer than you think. Discover sensible, effective weight loss plans from £129/month.
Average 15-21% weight loss¹
20+ years in obesity care
Money-back guarantee*
Cancel at any time**
Scale included
As a SemaPen subscriber, you'll receive a sleek Withings® smart scale worth £60.
It's simpler with SemaPen
See how our medically proven weight loss treatments help you succeed.
15-21%
average body weight lost in a year¹
27 BMI
cut-off for treatment***
95%
chance of responding to treatment
You've got 20+ years of obesity treatment expertise on your side
SemaPen is part of Phoenix Health: the only private bariatric provider trusted to provide NHS treatment.
SemaPen is not a pharmacy or an online-only doctor. As part of Phoenix Health, we've spent the last 20+ years providing expert medical treatment for obesity.
For you, this means peace of mind and a clear way forward. With SemaPen's sensible and effective weight loss plans, you can expect real-time support from real UK weight loss experts.
No confusion. No super-restrictive diets. Just tailored advice to give you the best chance of long-term success.
Your custom weight loss plan starts here
With up to 21% average reduction in body weight¹, the SemaPen programme is among the most effective non-surgical options for weight loss in the UK.
No appointments
Custom weight loss plan designed for you
Instant approval if you're eligible
1. Start your consultation
Use our self-assessment tool to learn instantly whether you're eligible. No appointments necessary.
2. Sign up to our programme
Unlock the SemaPen app to track your progress online and get 24/7 access to our weight loss experts.
3. We create a bespoke plan
Your weight loss plan is 100% tailored to suit your needs and maximise your chance of success.
A medical weight loss plan supported by experts
Discover what obesity treatment professionals have to say.
David Kerrigan has provided expert commentary on obesity for
The SemaPen money-back guarantee
Get results – or get your money back.*
We have total confidence in our medically proven weight loss treatments. And we want you to feel the same.
That's why we offer a money-back guarantee.
It's simple. If you don't lose at least 5% of your body weight after completing a SemaPen non-surgical weight loss treatment programme, we'll give you a refund.
The benefits of weight loss
Did you know that nearly 26% of adults in England have obesity?²
If a person is obese, they have a body mass index (BMI) greater than 30. Your BMI is an estimate of your body fat. It's calculated based on your height and weight.
You're considered to have a healthy weight if your BMI is between 18.5 and 24.9.
The World Health Organisation has called obesity a 'global epidemic'. The number of adults living with obesity worldwide has more than doubled since 1990.³
This is a big problem because obesity can cause all sorts of health issues. If you have obesity, you're more at risk of heart disease, bone disorders, type 2 diabetes and certain types of cancer. Adults with obesity are also more likely to develop depression.
That's why weight loss can be so life-changing. Not only can it improve your overall health, but it can also make you feel happier and more energised.
And you don't have to shed lots of weight to start feeling the benefits. If you lose just 5% of your body weight, you can expect:
- A reduced risk of cancer and type 2 diabetes
- Less joint pain and a reduced risk of developing arthritis
- Lower cholesterol, which means less risk of heart disease and strokes
- Decreased blood pressure
- Better sleep
For most people with obesity, losing 5% of their body weight means losing a few pounds. Now imagine what losing 21% of your body weight could do for you.
What would 21% weight loss look like for you?
The problem is that weight loss doesn't come easily to most people. While calorie-controlled diets and exercise are proven treatments for obesity, they need lots of willpower to get right. For many, eating habits are hard to shift – and some people find physical activity more difficult than others.
Have you tried diet and exercise but didn't see the results you wanted? The good news is that there are other options available – including non-surgical weight loss treatments. Together with diet and exercise, these kinds of obesity treatments can offer a vital helping hand to people who struggle to lose weight with traditional methods.
Here at SemaPen, we've created sensible weight loss plans that are medically proven to be safe and effective when prescribed by a doctor. To learn more, explore our obesity treatment programmes today.
Read more guides
Obesity treatments: what's available in the UK?
Learn more about the various obesity treatments available in the UK.
Diet and exercise tips
Discover helpful tips for meal planning and exercise while on our programmes.
How non-surgical weight loss treatments work
Explore the science behind SemaPen's custom weight loss plans.
Ready to get started?
Begin your weight loss journey today. Explore our treatments and learn how it all works.
Are you considering bariatric surgery?
SemaPen is part of Phoenix Health – one of the UK's leading obesity clinics and the only bariatric surgery provider trusted to provide NHS treatment.
With clinics across the UK, Phoenix Health helps more than 500 patients each year to lose weight and live a happier, healthier life.
Visit Phoenix Health today and learn what bariatric surgery could do for you.
Contact Details
17 D-F Telford Court, Chestergates Business Park, Chester, United Kingdom, CH1 6LT.
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1-14474096275
Partner Pharmacy GPhC number: 9011284
We only offer our programme in the UK and Northern Ireland. We are currently unable to deliver to the Republic of Ireland.