Where is BelleCell located?

BelleCell is at 21 Arlington Street, St James's, London SW1A 1RN, in Mayfair, set in a former wine cellar behind The Ritz.

How much does a package at BelleCell cost?

The clinic has not published line-item treatment prices on its website. Confirm current fees directly with the venue.

What are BelleCell's opening hours and how do I book?

BelleCell is open Monday to Saturday, 08:00 to 20:00. Bookings can be made by phone on +44 20 7495 2768 or by email at bookings@bellecell.com.

BelleCell

London · Mayfair · updated 4 July 2026

Phone to bookConsultation firstPhone to bookConsultation firstIs this your clinic? Claim it free

Prices checked once on record, 4 July 2026.

Peptide Therapy Stem Cell & Regenerative Longevity Clinics Biohacking Centers

Treatments: 16
Categories: 4

Call clinic Send enquiry View all treatments

BelleCell is a Mayfair regeneration and molecular wellness clinic at 21 Arlington Street, founded by Cambridge bioscientist Kasia Zajkowska, offering hyperbaric oxygen therapy, IV therapy and bespoke 100-day programmes built from blood and genetic testing.

Key facts

Location: 21 Arlington Street, St James's, London SW1A 1RN (Mayfair)
Founder: Kasia Zajkowska, University of Cambridge (Bioscience Enterprise and Molecular Biotechnology)
Core services: HBOT, IV therapy, InfraShape infrared pod, EMS suits, 3D body scan, blood and genetic testing
Opening hours: Monday to Saturday, 08:00 to 20:00
Booking: Phone +44 20 7495 2768 or bookings@bellecell.com
Setting: Former Churchill-era wine cellar behind The Ritz

BelleCell is a preventive health, regeneration and aesthetic clinic set in a former wine cellar at 21 Arlington Street in Mayfair, behind The Ritz. It was founded by Kasia Zajkowska, a University of Cambridge graduate in Bioscience Enterprise and Molecular Biotechnology, who positions the clinic around what she calls molecular wellness: using blood, metabolic and genetic testing to build individual 100-day programmes with coaching in nutrition, performance, life and health.

The treatment mix spans hyperbaric oxygen therapy, IV therapy, an InfraShape infrared vacuum pod, EMS training suits, 3D body scanning with body composition analysis, and digital skin analysis. The space is organised into face, body and detox treatment rooms, a Sports Performance Lab, and Fusion and Oxy lounges.

Most services are structured around consultation and testing rather than fixed single-session menus. One published package, the Lockdown Bounce Back, is a five-hour session priced at 595 pounds that bundles an infrared sauna, a nutrition consultation, digital skin analysis and a 3D body scan. The clinic is open Monday to Saturday and takes bookings by phone on +44 20 7495 2768 or by email at bookings@bellecell.com.

16 treatments across 5 categories in the menu section below.

Compiled from published research and each venue's own published information. Information only, not medical advice.

Information compiled from the clinic's website, last checked 4 July 2026.

Treatments

Sourced from the clinic's published menu. Prices are on enquiry unless shown.

Treatments: 16
Categories: 5
With pricing: 0

1 in Biohacking Centers

Treatment	Price
	On enquiry

Training
On enquiry
Training programmes for longevity service providers (frameworks and system protocols). Listed on the services page as 'coming soon'.

Team

Practitioner listed where available.

Kasia Zajkowska

Founder · Bioscience Enterprise and Molecular Biotechnology, University of Cambridge

molecular wellness · cellular ageing · longevity science · biohacking

Facility

Equipment

Regenerative (home longevity suite examples)Hyperbaric oxygen chamber, altitude training, light therapies (cited as examples of equipment BelleCell sources/designs for at-home longevity suites)
Temperature (home longevity suite examples)Infrared sauna, cryotherapy solutions (cited as examples)
Performance (home longevity suite examples)Metabolic testing, EMS training (cited as examples)
Retreat therapies3D body scans, red light therapy, oxygen therapies, EMS training, lymphatic drainage (offered within the retreat)

Practical information

Hours: Monday: 08:00-20:00; Tuesday: 08:00-20:00; Wednesday: 08:00-20:00; Thursday: 08:00-20:00; Friday: 08:00-20:00; Saturday: 08:00-20:00
Getting there: Mayfair / St James's
Website: bellecell.com
Amenities: Face treatment rooms, Body treatment rooms, Detox treatment rooms, Sports Performance Lab, Fusion lounge, Oxy lounge, Consultation rooms, WiFi
Certifications: Bioelemental Profiling: clinic states it follows the methodology of the UNESCO Trace Elements Institute Satellite Centre, member of FESTEM (Federation of European Societies on Trace Elements), DNA/genetic tests: clinic states labs are evaluated to laboratory quality standard ISO 15189
Consultation: Required before first session

Location

21 Arlington Street, St James's, London SW1A 1RN

Open in Google Maps

Frequently asked

Where is BelleCell located?: BelleCell is at 21 Arlington Street, St James's, London SW1A 1RN, in Mayfair, set in a former wine cellar behind The Ritz.
What treatments does BelleCell offer?: The clinic offers hyperbaric oxygen therapy, IV therapy, an InfraShape infrared vacuum pod, EMS training suits, 3D body scanning with body composition analysis, digital skin analysis, and blood and genetic testing used to build bespoke 100-day programmes.
How much does a package at BelleCell cost?: The clinic has not published line-item treatment prices on its website. Confirm current fees directly with the venue.
Who founded BelleCell?: BelleCell was founded by Kasia Zajkowska, a University of Cambridge graduate in Bioscience Enterprise and Molecular Biotechnology, who describes the clinic's focus as molecular wellness.
What are BelleCell's opening hours and how do I book?: BelleCell is open Monday to Saturday, 08:00 to 20:00. Bookings can be made by phone on +44 20 7495 2768 or by email at bookings@bellecell.com.