Clinical Nutrition & Diagnostics

About Fleur Borrelli

Fleur Borrelli is a clinical nutritional therapist with over 20 years of experience in functional and personalised medicine. She holds a Postgraduate Diploma in Clinical Psychoneuroimmunology (PGDip cPNI) and a BSc in Nutritional Medicine, and is a co-author of The In-Sync Diet. Fleur practises as an associate practitioner at Sport Dimensions, bringing her expertise in root-cause nutrition to complement the clinic's physiotherapy and rehabilitation services.

Fleur's approach is grounded in clinical psychoneuroimmunology (cPNI) — a discipline that examines the interconnection between the nervous system, immune system, and hormonal regulation, and how nutrition influences all three. Rather than treating symptoms in isolation, Fleur investigates the underlying mechanisms driving your health concerns and designs targeted nutritional strategies to address them.

The Root-Cause Approach

Clinical nutrition at Sport Dimensions is not about generic dietary advice or calorie counting. It is a root-cause approach that seeks to understand why your body is producing symptoms and what can be done at a biochemical and physiological level to restore balance.

Clinical psychoneuroimmunology (cPNI) provides the scientific framework for this approach. By understanding how your diet, lifestyle, stress response, gut health, and immune function interact, your nutritional therapist can identify the specific drivers of your condition — whether that is chronic inflammation, impaired detoxification, nutrient deficiency, gut dysbiosis, or hormonal imbalance — and address them through personalised nutrition, targeted supplementation, and lifestyle modification.

This approach is particularly effective for complex, multi-system conditions that have not responded to conventional treatment alone, including persistent digestive issues, chronic fatigue, hormonal disruption, autoimmune conditions, and stubborn weight management challenges.

Consultation Programmes

Sport Dimensions offers three structured consultation programmes, each designed to provide the appropriate level of support for your health goals. Your initial consultation will determine which programme is most suitable for your needs.

In-Sync Diet

The In-Sync Diet programme is based on the principles outlined in The In-Sync Diet, co-authored by Fleur Borrelli. This programme focuses on resynchronising your body's natural rhythms — circadian, hormonal, and metabolic — through targeted dietary and lifestyle changes. It is particularly suited to individuals seeking to optimise energy, body composition, and metabolic health through a structured, evidence-informed protocol.

Standard Nutrition Programme

The Standard Nutrition Programme provides a comprehensive nutritional assessment, personalised dietary plan, and follow-up consultations to monitor progress and adjust recommendations. This programme is appropriate for individuals with specific health concerns — such as digestive issues, fatigue, or hormonal imbalance — who require targeted nutritional intervention and ongoing clinical support.

Complete Health Reset

The Complete Health Reset is the most comprehensive programme, combining in-depth nutritional assessment with advanced diagnostic testing, extended consultation time, and a fully personalised recovery plan. This programme is designed for individuals with complex or longstanding health conditions who require a thorough investigation of underlying causes and a multi-faceted approach to recovery.

Diagnostic Testing

Advanced diagnostic testing allows your nutritional therapist to move beyond guesswork and identify the specific biochemical imbalances driving your symptoms. Sport Dimensions offers three categories of diagnostic testing, each providing detailed clinical data to inform your personalised nutrition plan.

Functional Blood Chemistry

Functional blood chemistry analysis goes beyond standard NHS blood panels by interpreting results within optimal functional ranges rather than broad reference ranges. This approach can identify early-stage imbalances before they develop into clinical pathology. Testing panels include thyroid function (full panel including TSH, free T3, free T4, and thyroid antibodies), vitamin D status, iron studies and ferritin, metabolic panels (glucose, HbA1c, insulin, lipid profile), and inflammatory markers (CRP, homocysteine). Results are interpreted in the context of your symptoms, history, and health goals.

Gut and Microbiome Testing

Gut health is central to overall wellbeing, influencing immunity, mood, energy, and nutrient absorption. Diagnostic options include comprehensive stool analysis (assessing digestive function, gut microbiome composition, inflammation markers, and parasitology), SIBO breath testing (for small intestinal bacterial overgrowth, a common cause of bloating, gas, and altered bowel habits), food sensitivity testing (identifying IgG-mediated food reactions that may be contributing to systemic inflammation), and intestinal permeability assessment. These tests provide the clinical evidence needed to design targeted gut restoration protocols.

DNA Health Testing

Nutrigenomic testing analyses specific genetic variants that influence how your body processes nutrients, responds to dietary components, and manages key metabolic pathways. Testing categories include nutrigenomics (how your genes influence nutrient metabolism and dietary requirements), methylation pathway analysis (MTHFR and related variants affecting folate metabolism, detoxification, and neurotransmitter production), detoxification capacity (Phase I and Phase II liver detoxification enzyme variants), and inflammation and oxidative stress predisposition. DNA testing results inform long-term dietary and supplement strategies tailored to your genetic profile.

Your Consultation

Your initial consultation typically lasts 60–90 minutes. Fleur will take a detailed history of your health concerns, medical background, current diet, lifestyle factors, stress levels, sleep quality, and digestive function. This comprehensive intake is essential for identifying patterns and connections that may not be apparent from symptoms alone.

Based on this assessment, Fleur will recommend appropriate diagnostic testing where indicated and begin developing your personalised nutrition plan. Follow-up consultations track your progress, review test results, and refine your programme as your health improves. The goal is always to equip you with the knowledge and tools to manage your health independently in the long term.

Frequently Asked Questions

What conditions can clinical nutrition help with?

Clinical nutrition is effective for a wide range of conditions including IBS and digestive disorders, chronic fatigue and low energy, weight management difficulties, hormonal imbalances (thyroid, adrenal, reproductive), autoimmune conditions, skin conditions such as eczema and acne, and general health optimisation. The root-cause approach is particularly valuable for conditions that have not responded to conventional treatment alone.

Do I need a GP referral?

No. You can book directly with Sport Dimensions without a GP referral. If your nutritional therapist identifies findings that require medical investigation, she will recommend you consult your GP or refer you for appropriate medical assessment.

How is clinical nutrition different from seeing a dietitian?

Registered dietitians typically work within NHS guidelines and focus on evidence-based dietary management of diagnosed conditions. Clinical nutritional therapy takes a broader, functional medicine perspective — investigating root causes, using advanced diagnostic testing, and designing personalised programmes that address the underlying drivers of symptoms rather than managing them. Both approaches are valuable and can complement each other.

What should I bring to my first appointment?

Bring any recent blood test results, medical reports, or test results you have. It is also helpful to keep a three-day food and symptom diary before your appointment, noting everything you eat and drink alongside any symptoms you experience. This provides valuable baseline information for your assessment.

How long before I see results?

Timelines vary depending on your condition, its complexity, and your adherence to the recommended programme. Some patients notice improvements in energy and digestion within two to four weeks. More complex or longstanding conditions may take three to six months of consistent work before significant improvements are evident. Your nutritional therapist will set realistic expectations based on your individual presentation.

Is the diagnostic testing optional?

Yes. Diagnostic testing is recommended where clinically indicated but is not mandatory. Your nutritional therapist will explain which tests would provide the most valuable information for your specific situation and why. You can proceed with nutritional therapy based on clinical assessment alone, though testing often accelerates the identification of root causes and allows for more targeted intervention.

Will I need to follow a restrictive diet?

Clinical nutrition is not about restriction for its own sake. Any dietary modifications are targeted, evidence-based, and designed to address specific clinical findings. Where elimination diets are recommended (for example, to identify food sensitivities), they are implemented for a defined period with planned reintroduction. The long-term goal is always a varied, enjoyable, and sustainable diet that supports your health.

How does clinical nutrition integrate with physiotherapy at Sport Dimensions?

Nutrition and physical rehabilitation are complementary. Optimal nutrition supports tissue healing, reduces inflammation, and improves recovery times. If you are also receiving physiotherapy, shockwave therapy, or other treatments at Sport Dimensions, your nutritional programme can be designed to support your rehabilitation — for example, through anti-inflammatory nutrition protocols, targeted supplementation for tissue repair, or gut health optimisation to improve nutrient absorption.

Supporting Your Recovery

• Follow your personalised plan consistently — Nutritional change takes time to produce measurable results. Commit to your recommended dietary and supplement protocols for the agreed period before assessing progress. Consistency is the strongest predictor of a successful outcome.
• Keep a food and symptom diary — Recording what you eat and any symptoms you experience helps your nutritional therapist identify patterns, track improvements, and refine your programme at follow-up consultations.
• Prepare meals in advance where possible — Planning and preparing meals reduces the likelihood of reverting to convenience foods that may not support your health goals. Batch cooking and meal preparation are practical strategies your nutritional therapist can help you develop.
• Communicate changes in your symptoms — Whether improvements or setbacks, reporting changes between consultations allows your nutritional therapist to adjust your programme in real time and ensures you stay on track.
• Be patient with the process — Root-cause nutrition addresses underlying imbalances rather than masking symptoms. This approach produces more sustainable results, but improvements may be gradual rather than immediate. Trust the process and the clinical reasoning behind your programme.
• Integrate nutrition with your broader health plan — If you are also receiving physiotherapy or other treatments at Sport Dimensions, view your nutritional programme as one component of a coordinated recovery strategy. Share your nutrition plan with your physiotherapist so your care is fully integrated.