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 Sciences and Masters degrees in Modern 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 in the Health Protection Agency and Public Health England. Leah practices functional healthcare a personalised approach to healthcare that recognises the biological uniqueness of individuals and focuses on resolving symptoms by addressing the underlying cause of a health problem.  This approach to healthcare is evidence based and views the body as an interconnected whole, acknowledging the importance of these connections in health and disease. 


High blood pressure, high cholesterol, metabolic syndrome, atopy,  autoimmunity, hormonal balance, preventative health, lifestyle modification

Join The Thrive Practice and finally start treating your 

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