Lantern Clinic-Private GP & Functional Medicine UK
We’re so glad you’ve found your way here.
At Lantern Clinic, we understand how difficult it can be to feel off-balance without clear answers.
That’s why we’ve created a different kind of private healthcare experience — one that’s personal, thorough, and grounded in both GP-led care and functional medicine.
Whether you're navigating hormonal shifts, gut health issues, or persistent symptoms that haven’t been resolved, this is a place where your story is heard and your healing journey can truly begin.
The Lantern Clinic Difference
Lantern Clinic is a private functional medicine clinic in the UK. We believe healthcare should be both comprehensive and personal. That’s why we combine traditional GP expertise with cutting-edge functional and integrative medicine — creating a space where you're heard, valued, and guided with care.
We take time to understand the full picture of your health and uncover the root causes behind your symptoms — not just manage them. Whether you're facing hormonal imbalances, fatigue, gut issues, or complex chronic conditions, we’re here to offer clarity and personalised solutions.
Here’s what sets us apart:
Integrated medical and functional care — where conventional GP medicine meets root-cause diagnostics
Compassionate, personalised support — time to listen, time to heal
Advanced diagnostics and modern treatments — including Emsella therapy, Microbiome and Metabolic Testing
A calm and welcoming environment — designed to support your long-term wellbeing
Our promise is simple: expert care, deeper answers, and support that goes beyond the surface.
Our Story&Vision
Lantern Clinic was born from a deep frustration with rushed, one-size-fits-all healthcare. As experienced GPs, we saw too many patients falling through the cracks — dismissed, unheard, or left with more questions than answers.
We founded Lantern Clinic to do things differently: to create a space where time, care, and curiosity are at the heart of every consultation. Here, we look beyond symptoms to find root causes, combining trusted medical knowledge with functional and lifestyle medicine to support long-term healing.
Our vision is to empower people to take control of their health — with clarity, confidence, and the ongoing support of doctors who truly listen.
Founder’s Perspective
Dr Margarita Kitova-John
MD, MRCGP, DFSRH, MSc, CFMP, IFMCP
I came to Functional Medicine not just through my clinical work, but through personal experience. Years ago, I faced persistent gut health issues that weren’t resolved by the conventional approach — test results were “normal,” but I still didn’t feel well. That frustration led me to explore root-cause medicine, where I finally found the answers and solutions I needed.
With over a decade of experience as an NHS GP — including helping to establish and lead a local GP Federation — I’ve seen how many people are looking for more time, clarity, and personalised support in their healthcare journey. At Lantern Clinic, I bring together conventional medical expertise and Functional Medicine to help patients uncover what’s really going on in their bodies and restore their health.
My clinical focus includes gut health, hormonal imbalances, fatigue, and burnout — always delivered with a personal, compassionate approach tailored to each individual
“After more than a decade of working as a front-line GP, I have come to understand that the vast majority of chronic diseases are a result of the modern lifestyle: the food we eat, the stress we endure, and the toxic environment we live in. I believe the majority of them are preventable and reversible with the right holistic interventions. I have learned and witnessed that the human body has the ability to repair itself. We must understand that the body's reserves are limited and that ageing negatively may affect the natural healing processes."
Meet Our Team
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![Dr. John]()
Dr Oommen John
MD, MRCGP, PG Cert Diabetes
Cardiovascular & metabolic health
Prevention and long-term vitality
Obesity, diabetes, high blood pressure, and memory issues
Root-cause approach to inflammation
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![Sacha Pennington-Ellis]()
Sacha Pennington-Ellis
MCSP, BSc Hons, PGDip, MMACP
Neuro-musculoskeletal physiotherapy
Holistic, patient-centred rehabilitation
Persistent pain, arthritis, back or neck pain, falls, stroke recovery, and post-surgical care
Functional assessments to support your recovery goals
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![Daria Nutritonal Therapist]()
Daria Ivanova
Nutritional Therapist
Daria is a qualified Nutritional Therapist with a focus on fertility, women’s health, and gut health. She supports clients with issues like IBS, thyroid imbalance, and hormonal health, both in London and online.
A distinguished graduate from the College of Naturopathic Medicine, Daria also lectures in Nutrition and Biomedicine.
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Dr Kate King
MBBS, MRCGP, FRACGP
Mental health & anxiety EFT
Gut health & nutritional support
Hormonal balance: thyroid, adrenal, menopause
Women’s health & perimenopause
Stress management
