Leah de Souza-Thomas
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This professional is available for new clients.
This professional is available for new clients.
About me
Take Control of Your Health—With Precision, Not Guesswork
You know your body best. If you're feeling frustrated, fatigued, or like something just isn’t right despite trying every diet, supplement, and generic health plan—you’re not alone. At The Thrive Practice, I help clients like you move beyond trial and error to a science-backed, personalised strategy that gets results.
Instead of guessing, I use precision testing and data-driven insights to uncover what’s really happening in your body. You don’t need another cookie-cutter approach—you need clear answers, a plan tailored to YOU, and expert guidance every step of the way.
Why Work With Me?
Most nutritionists offer general advice. I go deeper.
My approach is rooted in science and personalisation, ensuring that every recommendation is based on your unique biochemistry, lifestyle, and goals.
I combine functional nutrition, public health, and cutting-edge assessments to provide a 360° strategy for optimising energy, digestion, metabolic resilience and more. My process:
🔬 Identify – Uncover hidden imbalances with advanced functional testing.
🛠 Personalise – Build a custom plan based on real data, not assumptions.
🚀 Transform – Implement sustainable strategies with expert support.
Training, qualifications & experience
I bring over two decades of expertise in biomedical science, epidemiology, and public health, with advanced training in functional medicine, nutrition and lifestyle medicine. My qualifications include:
✅ BSc (Hons) Biomedical Sciences – Deep expertise in human biology and disease mechanisms.
✅ MSc Modern Epidemiology & MPH Public Health – A research-driven, prevention-focused approach.
✅ Institute for Functional Medicine (IFM) Advanced – Specialised in Gut, Hormone, Cardiometabolic, and Immune Health.
✅ Graduate Diploma in Integrative Functional Nutrition – Precision-based nutrition for long-term wellness.
Nutrition topics
info Information about health conditions (*)
Nutritional therapy can help enhance the well-being of individuals diagnosed with serious medical conditions, but should not take the place of medical treatment and advice. If you have been diagnosed with - or suspect you may have - any of these conditions, please speak to your doctor before starting nutritional therapy or making any major changes to your diet or lifestyle.
Fees
£95.00 - £2,200.00
Free initial telephone or online session
Health Insurance/EAP
Additional information
At The Thrive Practice, I provide personalised nutrition and functional health strategies to help you achieve sustainable wellbeing. My services support weight-loss, digestive health, hormone balance, heart health and energy resilience through evidence-based approaches.
What We Offer
✔️ Personalised Nutrition Plans – Designed to fit your body's needs, supporting a balanced diet, energy, weight management and a range of health goals.
✔️ Functional Testing Packages – Includes advanced lab testing, a personalised health plan, and professional support for a set period.
✔️ Programmes for Gut & Hormone Health – Structured programmes integrating functional testing, tailored nutrition, and ongoing support to optimise gut health including food intolerances, metabolism, and hormone balance.
✔️ 1:1 Health Optimisation Services – For individuals managing multiple symptoms, weight concerns, thyroid problems, blood sugar balance, stress, fatigue and skin conditions, offering customised support.
🔹 Single sessions are not offered, as long-term health improvements require a structured approach.
🚀 Take control of your health—book a consultation today.
When I work
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Further information
What to Expect When You Work With Me
💡 A clear, evidence-based roadmap tailored to YOUR body.
🥦 Nutrition & lifestyle strategies that work with your physiology.
🤝 Expert support & collaboration so you never feel lost.
🔬 Root-cause insights—because feeling better starts with the right knowledge.
🚀 Your health transformation starts NOW. Stop second-guessing and start seeing results.
Book a consultation today.
