Functional
Testing

WHAT IS FUNCTIONAL TESTING?

Testing that looks for causes, not just symptoms

Standard NHS blood tests are invaluable, but they are designed to detect disease and not to optimise health. Functional testing takes a different approach. Rather than checking whether a marker falls within a broadly "normal" range, it assesses whether your body is functioning at its best, examining the complex interplay between your hormones, gut microbiome, immune system, genes, and nutrient levels.

As a nutritionist specialising in eating disorders, disordered eating, weight management, and GLP-1 therapy, functional testing is central to how personalised, evidence-based care is provided. For individuals who have spent years in a difficult relationships with food, exercise, or body, getting objective data can be both reassuring and empowering, replacing
guesswork with clarity.

WHY FUNCTIONAL TESTING?

The insight standard testing can't give you

Functional testing is particularly valuable when you have persistent symptoms, a complex health history, or where multiple body systems are involved.

Seven pathways to a clearer picture of your health

Testing areas are selected based on your individual health history, symptoms, and goals. Not every area will be relevant to everyone, and recommendations are always made with clinical care.

HORMONAL HEALTH

Hormones influence almost every process in the body, from energy, sleep, and mood to weight regulation and menstrual health. Yet hormonal imbalances are frequently missed by standard blood tests, which often measure total hormone levels at a single point in time rather than examining how hormones are produced, converted, and cleared throughout the day.

IMMUNE FUNCTION

The immune system is not simply about fighting infection, it plays a central role in inflammation, autoimmunity, energy regulation, and even appetite. Chronic low-grade inflammation is now recognised as a key driver of many conditions, including fatigue, weight dysregulation, digestive problems, and mood disorders.

NUTRITIONAL & METABOLIC

Nutritional deficiencies are far more widespread than commonly recognised, and they frequently fail to appear on standard panels until depletion is well advanced. Functional nutritional and metabolic testing assesses a broad range of vitamins, minerals, amino acids, fatty acids, antioxidants, and metabolic markers, detecting insufficiencies before they cause clinical symptoms.

GUT HEALTH

The gut is often described as the body's second brain. The health of your digestive system influences immunity, mental wellbeing, hormone metabolism, nutrient absorption, and appetite regulation. Disruptions to the gut microbiome have been linked to a wide range of conditions, from IBS, bloating, and constipation to anxiety, brain fog, and weight dysregulation.

INTOLERANCE DIAGNOSTICS

Food intolerances are distinct from food allergies, they involve a delayed immune response that can make symptoms difficult to connect to specific foods. Bloating, headaches, fatigue, skin complaints, joint pain, and persistent digestive discomfort can all be triggered hours or even days after consuming a reactive food, making self-identification particularly challenging without clinical support.

DNA & PERSONALISED HEALTH

Your genes do not determine your destiny, but they do influence how your body processes nutrients, responds to different foods, manages inflammation, regulates weight, and functions across a range of key physiological processes. Nutrigenomic testing examines genetic variants that affect nutrient metabolism, detoxification pathways, hormonal processing, appetite regulation, and predisposition to certain health conditions.

GLP-1 HEALTH MONITORING

GLP-1 receptor agonists (such as semaglutide and liraglutide) are transforming the management of obesity and type 2 diabetes. However, the significant reduction in appetite and calorie intake associated with GLP-1 therapy creates a very real risk of nutritional insufficiency, including deficiencies in protein, iron, vitamin B12, vitamin D, calcium, and zinc, alongside potential loss of lean muscle mass and bone density.

“For the first time, I am truly in control, I’ve lost nearly 2 stone and finally feel like myself again.”

BETH