Redefining Healthcare, Resisting the Status Quo

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Functional Healthcare Specialists 

Our outcomes-driven, healthcare approach focuses on the root cause of disease to improve the health & wellbeing of our clients while reducing their reliance on prescription medication.


Defined by you, designed by us

Your personalised Thrive plan is based on symptom tracking, biomarkers and where necessary laboratory testing to help you define a plan that’s just right for you. You’ll meet regularly with your healthcare team for guidance, support and know-how, so that you can resolve chronic health conditions and improve your health.

We treat the root cause of your symptoms and give you the tools you need to maintain your health in the long term

Real results that change our members’ lives

We look at the big picture. Combining nutrition, lifestyle and laboratory testing to deliver life changing results.

Who’s behind The Thrive Practice

Leah de Souza-Thomas BSc (Hons), MSc, MPH

Leah de Souza-Thomas BSc (Hons), MSc, MPH

Public Health Epidemiologist, Founder & CEO



Leah has a bachelors degree in Biomedical Science and Masters degrees in Epidemiology and Public Health from Imperial College and Kings College London. She has spent 15 years working to protect and improve the public’s health and wellbeing working at the Health Protection Agency and Public Health England. Leah trained in Functional Medicine with the Institute of Functional Medicine and offers a unique experience for anyone keen to improve their health & wellbeing.


Preventative health, lifestyle medicine, cardiovascular health, metabolic health, hormonal balance, epigenetics 

Join The Thrive Practice and finally start treating your 

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