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Trusted Experts: Over 20 years of experience

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Specialist Care: Obesity experts, not just pharmacists

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Flexible Subscription: No strings attached

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Proven Results: Average 15–21% weight loss*

Weight Loss made simpler

Expect to lose around 15–21% of your body weight with SemaPen's non-surgical weight loss programme.*

Expect to lose around 15–21% of your body weight with SemaPen's non-surgical weight loss programme.*

Are you living with obesity? Tried diet and exercise without the desired results? Considering bariatric surgery but hesitant about the risks?

Our programme might be right for you.

Designed by UK doctors, our programme offers clinically proven methods as alternatives to gastric surgery. Our easy-to-follow plan can be implemented at home and is safe under medical supervision.

By following our tailored advice and comprehensive support, you can achieve significant weight loss results.*

How Do I Get Started?


Our weight loss solutions are available in the UK through a prescription, which means you need a medical consultation before approval.

But we've made it simple. Take our online consultation and find out instantly whether you're eligible.

A Subscription Worth Keeping

No strings. No hidden costs.** Just expert support to help you succeed.

With SemaPen, you'll always know your next steps. Join our subscription programme, and we'll be by your side for every success and challenge.

Here's how it works:

  • Quick Start: Receive your starter kit and a Withings® body scale (worth £60) within days.
  • Smart Tracking: Our smart scale uploads your weight data to the cloud, allowing our team to monitor your progress in real time.
  • 24/7 Support: Contact your support team anytime via the SemaPen app.
  • Automatic Deliveries: We'll send your next package automatically, so you never miss a beat.
  • Flexible Commitment: Cancel at any time—no strings attached.**

What's Included

  • Tailored Programme: We'll provide the right plan when you need it.
  • Expert Support: Ongoing advice from real obesity experts.
  • Smart Weight Tracking: A £60 Withings® smart scale to share your progress with our team in real time.
  • The SemaPen App: Diet plans, lifestyle advice, and direct contact with our support team.
  • Perks for Progress: Exclusive rewards for hitting your goals.
  • Money-Back Guarantee: Cancel anytime**—and get a refund if you don't lose at least 5% of your starting weight.***


Start your consultation

See How SemaPen Compares

SemaPen subscribers enjoy a tailored programme designed by one of the UK's most trusted obesity clinics. Online services don't come close.

SemaPen Leading Competitor
Type of Business Obesity clinic—part of Phoenix Health Group Online platform
Support Staff Trained clinicians: doctors, dieticians, psychologists, specialised nurses General practitioners or support staff
Years of Experience 20+ years 3+ years
Care Pathways Non-surgical solutions, psychological care, dietary advice, surgical treatments Limited options
Subscription Service Yes—automatic delivery No—manual reordering required
Advice and Support Throughout treatment Initial consultation only
Direct Support Line To obesity experts Limited support
Digital Scale Yes—with real-time progress tracking No
Weight Loss App Yes No
Rewards Programme Yes No
Money-Back Guarantee Yes No
Cancel Anytime Yes Limited flexibility
Start consultation

Trusted for 20+ Years

SemaPen is part of Phoenix Health, the only private bariatric provider trusted to offer NHS treatment.


While many online services offer weight loss solutions, they often provide limited care. They're not specialists and aren't equipped to deliver specialized obesity advice.


That's where SemaPen is different. As part of Phoenix Health, we've helped people succeed in their weight loss journeys for over 20 years.


With SemaPen, you're not dealing with general practitioners or support staff. You're receiving expert care from real weight loss specialists, including doctors, dieticians, psychologists, and specialised nurses.

How It Works

Start Your Consultation



To be approved for our weight loss programme in the UK, you must first have a medical consultation. Our online assessment, designed by obesity experts, gives you an instant answer.

Receive Your Starter Kit



If approved, you'll receive your starter kit within days. It includes everything you need to begin your journey.



Enjoy Tailored Support



Get proactive, personalized support from the UK's most trusted obesity experts. With automatic deliveries, you'll always have what you need.