Functional Testing: Looking Deeper Into Your Health
Targeted tests that help uncover what’s driving your symptoms, so your nutrition plan is built on evidence, not guesswork.
What Is Functional Testing?
Functional testing looks beyond whether a result is simply “normal” or “abnormal”. It explores how well key systems in your body are working, such as digestion, metabolism and how your genes influence your nutritional needs.
If you’ve been told your tests are fine but you still don’t feel well, functional testing can help fill in the gaps. Results give us a clearer picture, so your plan can target what your body actually needs.
Testing is never compulsory. Many clients make great progress without it. Where I do recommend a test, it’s because the results are likely to change what we do, and I’ll always explain why before you decide.
Tests I Use
Each test answers a different question. I’ll recommend only those that fit your symptoms and goals.
Gut Microbiome Testing
A stool test that analyses the bacteria living in your gut, along with markers of digestion and inflammation. It can be helpful if you live with bloating, IBS-type symptoms or ongoing digestive discomfort, or feel tired alongside gut problems.
Genetic (Nutrigenomic) Testing
A simple cheek swab that looks at genetic variations affecting how your body uses nutrients, such as certain vitamins, fats and caffeine. Your genes don’t change, so one test can guide your nutrition for life. Find out more about genetic testing.
Food Sensitivity & Allergy Testing
Can help highlight foods that may be contributing to symptoms like bloating, headaches or skin flare-ups. Results are a starting point, used alongside a structured elimination and reintroduction, so you never cut out foods unnecessarily. Suspected allergies, such as swelling or breathing difficulties, should always be assessed by your GP.
Metabolic Testing
Looks at markers of how your body produces energy and manages blood sugar, such as glucose, insulin and HbA1c. It can be useful if you experience persistent tiredness, energy crashes or weight changes, or have a family history of type 2 diabetes.
Nutrient Status Testing
A finger-prick or blood test checking key nutrients such as vitamin D, B12, ferritin (iron stores) and omega-3 levels, which all play a role in energy, mood and immunity.
Full Thyroid Panel
A more complete picture of thyroid health than a standard GP check, including thyroid hormones and antibodies.
Hormone & Stress Testing
Looks at sex hormones and cortisol (your main stress hormone) and how they change through the day.
SIBO Breath Test
A home breath test for small intestinal bacterial overgrowth, a common cause of bloating soon after eating.
Making the Most of Your GP Tests
Many useful tests are available through your GP, such as a full blood count, thyroid function, vitamin D, B12 and iron. I can help you understand which tests to ask about, and look at your results through a nutritional lens, including where they sit within the reference range, not just whether they’re flagged.
How Testing Works
1. We discuss whether testing will help
In your consultation we look at your symptoms and history, and decide together if a test is worthwhile.
2. Your sample kit arrives at home
Most tests are simple home kits sent by post. A few need a blood sample, and I’ll explain how that’s arranged.
3. The lab analyses your sample
Samples go to an accredited laboratory, and results usually come back within a few weeks.
4. We go through your results together
I’ll explain what your results mean and build them into your Personalised Health Optimisation Plan.
“Tara has helped me make sense of a lot of what is going on… she offers so much more joined up thinking and insights than my GP has ever been able to do… She worked with my GP to get the right testing so that I am now a much happier, healthier person.”
– sarah, google review ⭐⭐⭐⭐⭐
What Does Testing Cost?
Functional tests are provided by external laboratories, so they’re charged separately from consultation fees. Costs vary by test, and I’ll talk you through the options before you decide. See my consultation prices.
Your Questions Answered
Do I need testing to work with you?
No. Testing is always optional. Many clients make real progress through diet and lifestyle changes alone.
Can I order a test without a consultation?
Tests are most useful when results are interpreted alongside your symptoms and history, so they’re arranged as part of working together.
Will my GP accept these results?
Functional tests aren’t a replacement for medical diagnosis. Where results suggest something your GP should look at, I’ll recommend you share them, and I’m happy to write a summary for you to take along.
Are the tests done at home?
Most are home kits sent by post. A few need a blood sample, and I’ll explain how that’s arranged.
Not Sure Which Test Is Right For You?
Book your free discovery call and we’ll talk through your symptoms, your goals and whether testing could help.