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.
Download your free copy and take the first step toward understanding how your body was designed to work.
Download The In-Sync Diet FREE
Sound familiar?
You are ready for a clinical picture that joins everything up.
You know something is not right. You have tried protocols, elimination diets, expensive supplements and nothing has held. Your symptoms keep shifting, and nobody has ever asked what started all of this. The harder you search for answers, the more out of reach they feel.
Ready for Real Change?
Choose Your Path Forward:
1:1 Work With Fleur
One-to-one clinical consultations combining psychoneuroimmunology, nutritional therapy, and metabolic medicine. We look at the whole picture, your nervous system, your immune system, your history, and your symptoms, and identify what has actually been driving your health. This is where the dots get joined.
What I Offer:
1. The Metabolic Reset
2. The Gut Reset
3. The Complete Health Reset
In-Sync Reset: 8-Week Group Programme
An 8-week group programme rooted in clinical psychoneuroimmunology and evolutionary biology. Designed to restore metabolic flexibility, regulate hormones, and rebuild immune resilience. Not a diet. Not a detox. A whole new way of understanding and working with your body.
"Working with you opened my eyes to the intricate connections between my mind, immune system, and overall wellbeing. I found myself gaining greater resilience, feeling more empowered in managing stress, and noticing improvements in both physical health and emotional balance. Your holistic approach helped me understand not only the science behind these links but also how to practically integrate healing strategies into my daily life – and not just about leafy greens!!"
"The sessions became a ‘weekly catch up’ where I could explore not just symptoms, but the root causes of imbalance. I discovered how simple shifts — like conscious breathing, mindful movement etc —could ripple outward, transforming my body’s response to everyday life. I have to say these insights didn’t just change how I felt; they reshaped how I see the future."
"I am now becoming much more aware of when I am truly hungry versus emotional eating."
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"I tried the day of fasting and actually I think it was really interesting to find how your body adapts and I was surprised that I wasn't starving or really thirsty by the evening. It felt like I'd kick-started my system - woken everything up!"
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"As you know, I am really interested in health and nutrition and have many books etc– and of course there is so much noise out there! However, your approach was more advanced and included new and 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. The personalized support, encouragement, and trust you built have made an enormous difference in my journey. I’m confident that others would find the same empowerment, clarity, and hope that I discovered in your care."
Meet Fleur Borrelli
Clinical Psycho-Neuro-Immunologist | Nutritional Therapist | 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.
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.
