NATUROPATHIC
NUTRITION
CLAIRE JARVIS
ND, DipNT, mCNHC, mANP, mGNC
NATUROPATH & NUTRITIONAL THERAPIST
FUNCTIONAL MEDICINE TESTING
A Deeper Insight into Your Health
Functional testing provides a detailed look inside the body’s systems to uncover the root causes of imbalance and guide a more precise, personalised approach to your health.
Rather than guessing, these advanced laboratory tests measure key biomarkers that help identify nutritional deficiencies, hormonal changes, digestive issues, inflammation and other underlying patterns that may be contributing to symptoms.
Used alongside Claire’s naturopathic expertise, functional testing allows for a clear, evidence-based plan that targets the causes of imbalance rather than simply addressing the symptoms.
As a Naturopath and Nutritional Therapist, Claire uses only trusted, clinically validated laboratories, ensuring that your results provide meaningful insight and a clear direction for effective, practical change.
A Deeper Look at Your Health
Claire’s approach combines scientific precision with extensive clinical experience in naturopathy, nutrition, and functional medicine.
She uses a range of clinically validated functional tests to assess key areas such as:
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Digestive and gut health
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Hormonal balance
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Nutrient status and metabolism
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Detoxification and inflammation
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Cardiometabolic and thyroid health
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Food sensitivities and intolerances
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Genetic and epigenetic factors
Each test is interpreted through a functional lens, focusing on optimal ranges rather than disease markers alone. This approach provides a more complete picture of your health and helps identify where systems may be underperforming, even if your standard results appear “normal.”
Functional medicine testing can takes the guesswork out of your health, providing clarity, confidence, and a roadmap for lasting balance.
What to Expect
You’ll receive a comprehensive interpretation of your test results in the context of your symptoms, health history, and goals, alongside your personalised protocol.
Claire translates complex data into clear, actionable insights — showing you exactly what the findings mean for your body and how to use them to improve your wellbeing as part of your consultation or package.
Turning data into direction — helping you understand your body and take confident steps toward lasting health.
FUNCTIONAL MEDICINE
TESTING PACKAGES
Every client’s health story is unique and so is the testing approach. Whether you’re looking to understand your hormones, improve gut health, assess nutrient levels, or explore your genetics, the right test can provide answers that bring your health picture into focus. Here are just some of the most popular testing options
COMPREHENSIVE STOOL TESTING
Your gut is central to almost every aspect of health - from immunity to hormones and mood.
Comprehensive stool testing evaluates digestion, microbial balance, inflammation, and infection markers, revealing what may be driving symptoms such as bloating, IBS, skin conditions, or fatigue.
Measures:
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Beneficial and pathogenic bacteria
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Yeast, parasites, and viruses
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Gut inflammation and immune markers (such as calprotectin and secretory IgA)
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Digestive enzyme function
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Intestinal permeability (“leaky gut”)
Useful for:
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Bloating, IBS, or constipation/diarrhoea
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Food sensitivities or intolerances
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Skin issues (eczema, acne, rosacea)
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Low mood, anxiety, or fatigue
SIBO BREATH TESTING
Small Intestinal Bacterial Overgrowth (SIBO) occurs when excess or abnormal bacteria populate the small intestine, disrupting digestion, nutrient absorption and overall gut function.
This can lead to a range of symptoms that often overlap with IBS and other digestive disorders.
This gold standard, non-invasive breath test measures hydrogen and methane gas production to identify both SIBO and Intestinal Methanogen Overgrowth (IMO). Understanding your results helps to guide a targeted nutrition and lifestyle protocol to restore healthy balance within the gut.
Useful for: Persistent bloating, gas, reflux, or abdominal discomfort Constipation, diarrhoea, or alternating bowel habits Ongoing nausea, indigestion, or IBS-type symptoms Fatigue, brain fog, or mood changes after meals Skin issues, headaches, or hormonal symptoms linked to gut imbalance History of antibiotic use, food poisoning, or gut infections Test includes: At-home breath test using a lactulose substrate (2–3 hours total) with easy-to-follow instructions Laboratory analysis of hydrogen and methane gas patterns Professional interpretation and review of your report Option to include a full consultation or package for a comprehensive SIBO protocol and ongoing support
FUNCTIONAL FDX BLOOD TESTING & ANALYSIS
FunctionalDX (FDX) offers one of the most comprehensive blood chemistry analyses available, providing a detailed overview of how your body’s systems are functioning.
This test goes far beyond standard GP panels, helping to identify the root causes of symptoms such as fatigue, low mood, hormonal imbalance and inflammation before they progress into more significant issues.
Using advanced analysis, FDX evaluates how nutrients, hormones, organs and systems interact, giving a full picture of your current health and helping to build a personalised plan to restore balance and vitality.
Measures & Uses: Measures Blood sugar balance and energy metabolism Nutrient status and oxidative stress Hormone and thyroid function Liver, kidney and cardiovascular health Inflammatory and immune markers Useful for: Persistent fatigue or low energy Hormonal, thyroid or metabolic imbalance Low mood, anxiety or poor concentration Poor recovery or unexplained inflammation Those wanting a proactive health overview or preventative check Test includes: Blood draw arranged locally with comprehensive lab analysis Detailed report mapped into functional body systems Professional review and interpretation of results Option to include consultation or package for ongoing nutrition and lifestyle support
FOOD SENSITIVITY PACKAGE | £139
IgG Blood Test (200+ Foods) & Review
Around 70% of our immune system is located in the gut, making gut health central to our overall wellbeing.
If inflammation from the gut may be contributing to your daily symptoms, this IgG food sensitivity test can help identify foods that might be triggering an immune response in your body.
Perfect for you if:
You suspect you’re reacting to certain foods but don’t know where to start. This test analyses your body’s immune reaction to over 200 foods.
You experience symptoms that may be linked to inflammation including digestive discomfort or bloating, migraines or headaches, low energy or fatigue, skin issues such as eczema or acne, and sinus, throat or respiratory irritation.
Package includes: Free Discovery Call Fuss-free at-home testing kit – a simple finger-prick test with return postage to the lab 200+ Food IgG Test 30-minute online or phone review consultation Personalised handout and nutritional guidance following your review Depending on results, you may choose to include: Further support to ensure your diet remains balanced and optimal during food removal trials Gut optimisation support to improve digestion and tolerance, enhancing your overall gut and immune response
GUT & SENSITIVITY PACKAGE | £350
Gut Barrier + IgG Immune
Complex Test & Review
A premium, in-depth test that combines gut barrier analysis with immune response profiling.
This includes markers for candida, zonulin, occludin, IgG, and immune complexes, helping to identify inflammation originating in the gut, signs of leaky gut, and possible food sensitivities that may be contributing to your symptoms.
Perfect for you if:
You suspect you’re reacting to certain foods and want to identify potential triggers and assess the health of your gut barrier.
Ideal for those: experiencing autoimmune conditions, arthritis, migraines, thyroid issues, brain fog, fatigue, digestive discomfort, skin issues, endometriosis, or fibroids. Package includes: Free Discovery Call Fuss-free at-home finger-prick test with return postage to the lab for analysis Testing for 176 different foods and additives, including IgG and immune complex responses Gut Barrier Testing with indicators for candida and zonulin 30-minute online or phone consultation for review Personalised handout and nutritional guidance following your review Depending on your results, you may choose to include: Further support to ensure your diet remains balanced and optimal during food removal trials Gut optimisation support to strengthen digestion and improve tolerance for food reintroduction, supporting long-term gut and immune health
DUTCH® COMPLETE HORMONE TESTING
This advanced hormone test provides a detailed insight into your hormonal health, analysing the function and balance of 35 sex and adrenal hormones, including:
• Oestrogen
• Progesterone
• Testosterone
• DHEA
• Cortisol
It also assesses neurotransmitter function and key nutrients essential for hormonal balance, such as vitamins B12 and B6.
Who benefits from a DUTCH® hormone test? Both women and men can gain valuable understanding from this test, helping to uncover the root causes of sex hormone and adrenal imbalances that may contribute to: Chronic fatigue and burnout Fertility challenges Low libido Irregular or heavy periods PMS (premenstrual symptoms that are common but not normal) PMDD PCOS Endometriosis Menopause Adenomyosis Fibroids Mood swings Acne Weight gain Prostate disorders
OTHER FUNCTIONAL TESTING
Personalise your journey to suit your goals
I offer a comprehensive range of functional medicine tests designed to explore your health at a deeper level -helping to identify root causes, uncover hidden imbalances, and guide highly personalised nutrition and lifestyle strategies.
Whether you’re struggling with specific symptoms or simply want to optimise your wellbeing, these tests can provide powerful insights to support your health journey.
Testing options include: Functional Blood Work, assessing: Nutrient status (iron, B12, vitamin D, magnesium, folate) Thyroid health Inflammation and metabolic markers Cardiovascular risk and liver function Hormone Panels, including: DUTCH Test (Dried Urine Test for Comprehensive Hormone Testing) OAT Test (Organic Acids Test) Mycotoxin and Environmental Exposure Testing With so many options available, I always recommend starting with a free Discovery Call to discuss your symptoms, history, and goals, so we can determine the most relevant testing options for your individual needs.
BOOK A FREE
CONSULATION CALL
Start your journey to better health by booking a free discovery call with me. Together, we’ll explore how naturopathic nutrition can help optimise your body’s functioning, restore balance, and support you in feeling your best. I offer a range of consultation packages to suit your needs and budget — from targeted support to more in-depth, personalised guidance.
This call is the perfect opportunity to discuss your goals and discover which approach is best suited to you.
Let’s work together to help your body function at its best — naturally.
Other Ways to Work with Claire
Testimonials
“Claire, I just wanted to say thank you for your professional help and advice. My symptoms of anxiety have mostly disappeared, I feel so much better and my sleep has also improved! Whenever I do feel anxious, the lifestyle tips you gave me have really helped me to manage it. The plan was easy to follow and I am still incorporating everything that you suggested into my diet and daily routine, and I really haven’t looked back!.”
Sara