CLINICAL PSYCHONEUROIMMUNOLOGIST & NUTRITIONAL THERAPIST · LONDON
FLEUR BORRELLI · BSc NUT MED · MSc CPNI
Most people have been assessed at the symptom level.
The real picture lies one layer deeper.
I work at the intersection of the nervous system, metabolic health, and immunology, tracing the connection between how your body has adapted to your environment and your symptoms, and moving you forward from there.
60–90 minutes · with Fleur personally · £150 credited toward your programme
Book your initial consultation
DOES THIS SOUND FAMILIAR?
You are ready for a clinical framework that connects the full picture.
You know your health has changed, yet despite multiple interventions, restrictive diets, supplement protocols, investigations, and symptom-based treatments, the underlying pattern may never have fully resolved. Symptoms fluctuate, evolve, or appear unrelated, leaving you feeling as though no single explanation accounts for the whole picture.
What is often missing is a deeper exploration of the mechanisms driving dysfunction in the first place: what initiated the process, what continues to perpetuate it, and how the nervous, immune, endocrine, and metabolic systems may be interacting together.
Â
WHERE TO BEGIN
Choose your path forward.
START HERE · £150
Initial Consultation
A 60–90 minute clinical session that traces the original mechanism behind your symptoms. Your full history heard, your systems assessed, your path forward mapped. The £150 is credited toward your programme if you continue.
Â
Find out more1:1 PROGRAMMES
Individual Programmes
Three tailored 1:1 programmes; the Metabolic Reset, Gut Reset, and Complete Health Reset. Each programme is built around your specific clinical picture. Whole-system resets rooted in cPNI.
Â
View programmesGROUP PROGRAMME
In-Sync Reset — Group
An 8-week group programme rooted in clinical psychoneuroimmunology and evolutionary biology. Designed to restore metabolic flexibility, regulate hormones, and rebuild immune resilience.
Â
Â
Join the waiting listTHE CLINICAL APPROACH
Everything in the body is communicating everywhere, all of the time
Your nervous system talks to your immune system. Your immune system talks to your metabolism. Your metabolism talks to your brain. And the insula integrates signals from all of them simultaneously ; your history, your environment, and your internal state. This is anatomy and physiology.
Read about the cPNI framework →WHAT CLIENTS SAY:
The dots, finally joined.
Working with Fleur opened my eyes to the intricate connections between my mind, immune system, and overall wellbeing. I found greater resilience, felt more empowered managing stress, and noticed real improvements in both physical health and emotional balance.
Clive, Birmingham
The sessions became a weekly catch-up where I could explore not just symptoms, but the root causes of imbalance. These insights didn't just change how I felt — they reshaped how I see the future.
Sam, Darlington
Your approach was more advanced and included cutting-edge research but delivered in an easy-to-understand way. Your unique combination of professional excellence, warmth, and real-world practicality sets you apart.
Lindsay, Jersey
Fleur has completely changed the way I look at food and think about my movement. I lost weight around my waist, face, and thighs. My skin glows more, my nails are stronger, and my sleep has improved.
Sophie, London
When I first saw Fleur I was in so much pain I could hardly move or sleep. Around a year later I had no symptoms of Rheumatoid Arthritis at all — no swelling and no pain. I feel very lucky and blessed to have found her.
Adina, London
Â
It felt like I had kick-started my system — woken everything up. I was surprised I wasn't starving by the evening. Something genuinely shifted.
Vanessa, Dorset
MEET FLEUR BORRELLI
BSc Nut Med, MSc cPNI
Clinical Psycho-Neuro-Immunologist | Nutritional Therapist London | Author of The In-Sync Diet
Have you ever had a single moment that changed everything?
For me, it was June 1982, in a quiet Wiltshire village. My father, the local GP, wise and deeply respected, was my role model. That summer, my family life shifted dramatically, and years later, a discovery about my father’s silent trauma during World War II revealed something profound.
Our unspoken experiences shape our health more than we realise. What happens to us, and how we adapt to it, shows up in the body long after the event has passed.
That discovery set me on a different path. For over 20 years I have worked at the intersection of clinical psychoneuroimmunology, nutritional therapy, and metabolic medicine, understanding that what happens to us, and how we adapt to it, shows up in the body long after the event has passed. My work is to join those dots; to find the original mechanism and to help you understand your body in a way that finally makes sense.
Â
Read more about Fleur and the cPNI approach
Discover the Book That Started It All
Co-authored with actress Glynis Barber, The In-Sync Diet introduces an evolutionary approach to fat burn, hormonal balance, energy, and long-term wellbeing.
Â
Â
Â
READY TO BEGIN
You have been searching for answers long enough.
The next step is one that finally connects your history, your physiology, and your symptoms in a way that makes sense.
Book your initial consultation