London · New York · Zürich
Longevity.
Regenerative.
Ageless Living.
The Catalyst Clinic is a physician-led longevity and regenerative medicine clinic operating in London, New York, and Zürich. Led by Dr. Ethan Hausman-Marquis — PhD in Cell and Genomic Biology, doctor-scientist, US and European board-certified, and author of two published works in peptide science. We go beyond aesthetics, offering a comprehensive approach to longevity that nourishes your wellbeing from head to toe, inside and out.
Our Services
The Catalyst Clinic provides wellness and lifestyle advisory services. All peptide compounds are subjects of ongoing scientific research. Nothing on this page constitutes medical advice. Compliance statement →
What We Do
Beyond Aesthetics.
A Complete Approach to Longevity.
The Catalyst Clinic transcends conventional aesthetics. We offer a transformative, physician-led journey built on diagnostics and personalised data — not templates — integrating regenerative medicine, peptide advisory programmes, hormonal optimisation, metabolic health, nutritional guidance, structured fitness planning, and supportive coaching.
Everything evolves with your biomarkers, your goals, and your lived experience. The aim is simple: help you stay stronger, sharper, more resilient, and more aligned with the way you want to live — not just for a season, but for life.
At The Catalyst Clinic, age-less living is not a slogan. It is a clinical standard — applied to every patient, without exception, from our very first consultation.
What We Offer
- Peptide advisory programmes
- Dermal fillers & injectable aesthetics
- Neurotoxin treatments
- Exosomes & regenerative therapies
- Microneedling & skin rejuvenation
- Blood diagnostics & biomarker analysis
- Hormonal optimisation advisory
- Men's health consultations
- Bespoke supplementation via AURION™️
- Mental health & stress regulation
- Bespoke personal training
Our Services
Three Pillars.
One Standard of Care.
Every service at The Catalyst Clinic is built on the same diagnostics-first, physician-led framework — whether you are here for aesthetic medicine, regenerative health, or longevity science.
01
Aesthetic Medicine
Aesthetics & Skin
Evidence-based aesthetic treatments designed to enhance your natural appearance and restore skin health — administered by physician-led clinical staff.
- Dermal fillers
- Neurotoxin (anti-wrinkle)
- Skin boosters & Nucleofill
- Microneedling
- Chemical peels
- Facial reconstruction
- Gender affirming treatments
02
Regenerative Medicine
Regenerative & Cellular
Advanced regenerative therapies that work at the cellular level — restoring, repairing, and renewing from the inside out. All programmes begin with mandatory comprehensive bloodwork.
- Exosomes therapy
- Peptide advisory programmes
- Blood diagnostics & biomarker analysis
- Hormonal optimisation advisory
- Men's health consultations
- Bespoke supplementation (AURION™️)
03
Longevity Science
Longevity & Lifestyle
Comprehensive longevity programmes integrating peptide science, metabolic health, mental performance, and lifestyle medicine — designed around your data and your biology.
- Longevity peptide protocols
- Metabolic & nutritional guidance
- Mental health & stress regulation
- Bespoke personal training
- Cognitive function advisory
- Sleep quality optimisation
Why The Catalyst Clinic
A Higher Standard
in Every Clinic We Open
The same diagnostics-first, physician-led clinical standard — applied equally whether you are in London, New York, or Zürich, and whether your consultation is in person or remote.
01
Mandatory Diagnostics — Always
Comprehensive bloodwork before any advisory or treatment programme begins. Applied to every patient, without exception. No data means no clinical basis.
02
PhD-Level Physician Oversight
Led by Dr. Ethan Hausman-Marquis — PhD in Cell and Genomic Biology, doctor-scientist, US and European board-certified. Every result reviewed personally.
03
Pharmaceutical Grade — No Exceptions
GMP-certified, EMA-regulated, FDA-registered pharmacies exclusively. Certificate of analysis on every order. No grey-market sourcing.
04
Published Author in Peptide Science
Author of two published works in peptide science. The only peptide clinic physician in London with published works specifically in this field.
05
Injectable Pen Technology
First clinic in London to offer peptides via injectable pen — accurate, consistent dosing without the complexity of traditional syringes.
06
Ongoing Clinical Monitoring
Monthly physician reviews and repeat bloodwork every four to five months. Clinical oversight that continues for as long as you are with us.
The Physician
Dr. Ethan Hausman-Marquis
Dr. Ethan Hausman-Marquis
Founder, Lead Physician & Doctor-Scientist
- PhD, Cell & Genomic Biology — Doctor-Scientist
- Research — L'École Normale Supérieure, Paris
- US Board-Certified, Regenerative Medicine
- European Board-Certified, Longevity Medicine
- Member, A4M
- Author — Peptide-Based Cancer Therapies
- Author — Exploring the World of Peptides
- Host — The Science of Ageless Living Podcast
- Nearly 20 years specialist research experience
"Our artistry is subtle, natural, and designed to enhance your inner and outer glow. What truly sets us apart is our regenerative approach — we go beyond aesthetics to offer a comprehensive range of longevity services that nourish your wellbeing from head to toe, inside and out."
Dr. Ethan founded The Catalyst Clinic on a simple principle: long-term health comes first. From his early studies at UCLA, through advanced research at L'École Normale Supérieure in Paris and doctoral work in Cell and Genomic Biology, his scientific path has been guided by one goal — helping people live longer, healthier, and more vibrant lives.
Author of two published works in peptide science and host of The Science of Ageless Living podcast. No other peptide clinic physician in London has published specifically in this field. Every programme at The Catalyst Clinic is personally designed and overseen by Dr. Ethan — no templates, no delegation, no algorithms.
Educational Content
Peptides in Two Minutes
An animated two-minute explainer on what peptides are — an introduction to these short-chain amino acid molecules and why they are generating scientific interest in longevity and regenerative research.
Created by Dr. Ethan Hausman-Marquis, PhD in Cell and Genomic Biology, doctor-scientist. Designed for anyone curious about the science before booking a consultation.
The Podcast
The Science of Ageless Living
The Leading Longevity Podcast
Hosted by Dr. Ethan Hausman-Marquis — PhD in Cell and Genomic Biology, author, and one of the world's leading peptide researchers. Each week, The Science of Ageless Living explores the molecular biology of longevity, the power of peptides, the genetics of ageing, and the practical tools that can help you thrive at any age.
No hype. No supplements to sell. Just the science — explained by a physician who has spent nearly 20 years studying it. Whether you are here to reverse ageing, enhance vitality, or simply live with more purpose, this podcast is your guide to living longer and better.
Published Works
Dr. Ethan's Books
The only peptide clinic physician in London with published works specifically in peptide science. Available on Amazon in paperback, Kindle, and audiobook.
Longevity Science · Peptide Research
Exploring the World of Peptides: From Basics to Breakthroughs
A comprehensive scientific guide to peptides — from foundational molecular biology to the latest breakthroughs in longevity and regenerative research. Written for clinicians and scientifically curious readers alike.
Oncology · Precision Medicine · Peptide Science
Peptide-Based Cancer Therapies: A New Frontier in Precision Medicine
A rigorous scientific exploration of peptide-based approaches in oncology — examining how peptide compounds are being investigated as targeted delivery vehicles in precision cancer medicine. Grounded in Dr. Ethan's PhD research in Cell and Genomic Biology.
Our Locations
Three Cities.
One Standard.
In person in London, New York, or Zürich — or remotely, anywhere in the world. The same diagnostics-first, PhD-level clinical standard, always.
Begin Your Journey
Every programme
begins with
your data.
Ready to experience a genuinely diagnostics-first, physician-led approach to longevity and regenerative wellness? Begin with a discovery consultation — in person at our London, New York, or Zürich clinics, or remotely anywhere in the world.
Every Programme Includes
- Mandatory pre-consultation bloodwork
- Personal review by Dr. Ethan
- Pharmaceutical-grade compounds where applicable
- Bespoke protocol — no templates
- Injectable pen delivery where applicable
- Monthly physician reviews
- Repeat bloodwork every 4–5 months
- Full clinical documentation
London · 96 Kensington High Street, W8 4SG
New York · 154 Grand St, 5th Floor, NY 10013
Zürich · Bahnhofstrasse 10, 8001
Remote consultations available worldwide
hello@thecatalystclinic.com
The Catalyst Clinic provides wellness and lifestyle advisory services. Peptide compounds referenced on this site are not licensed medicines under the Human Medicines Regulations 2012 and are not approved by the MHRA for human use in a therapeutic, aesthetic, or wellness context. Nothing on this page constitutes a treatment recommendation, prescribing guide, or medical advice. Where clinically appropriate and legally available through the relevant prescribing pathway, programmes may include discussion of pharmacy-compounded products sourced from GMP-certified, EMA-regulated, and FDA-registered compounding pharmacies. For our full compliance statement please visit thecatalystclinic.com/compliance-uk.