Comprehensive Food Intolerance
Expert blood collection,
available at home or in clinic
* Phlebotomist blood draw included
* UK accredited lab
* Results in days
Why take this test?
If you want to understand what foods might be affecting how you feel every day
If you’re dealing with ongoing bloating, low energy, headaches, or just don’t feel your best — and can’t quite figure out why — your diet could be playing a bigger role than you realise.
Food intolerances aren’t always obvious. Reactions can be delayed and subtle, making it hard to pinpoint the cause. This test gives you a broader view of how your body responds to different foods, helping you identify potential triggers and take control of your wellbeing with confidence.
What does it test?
IgG antibodies
Bloating, Fatigue, or Brain Fog After Eating?
Find the Cause with a Food Intolerance Blood Test
Struggling with unexplained bloating, low energy, or flare-ups after meals? You’re not alone.
Food intolerances are a common cause of digestive discomfort and fatigue. Unlike food allergies, which trigger immediate reactions, intolerances can cause delayed symptoms—sometimes appearing hours or even days after eating. This makes it difficult to identify the foods responsible.
Common symptoms of food intolerance include:
- Bloating and stomach cramps
- Fatigue and sluggishness
- Brain fog and poor concentration
- Skin issues such as acne or eczema
- Low mood or irritability
These symptoms are often mistaken for conditions like IBS or dismissed as “just one of those things.”
Identify Your Triggers with an At-Home Test
Our Food Intolerance Blood Tests measure IgG antibody responses to a wide range of foods, helping you uncover potential sensitivities.
Choose the right test for you:
- Starter – Ideal for checking common food triggers
- Advanced – Covers a broader range of foods for deeper insight
- Comprehensive – Our most detailed test for a complete picture
With clear results and guidance, you can eliminate trigger foods, reduce symptoms, and regain control of your health and energy levels.
Feeling Bloated, Tired, or Foggy After Eating? It Could Be a Food Intolerance
If you regularly experience bloating, fatigue, brain fog, or skin breakouts after meals, it may not be a coincidence. These are common signs of a food intolerance.
Unlike food allergies, which cause immediate and often severe reactions, food intolerances trigger a delayed immune response. This means symptoms can appear hours—or even days—after eating certain foods, making it difficult to identify the cause without proper testing.
Food intolerances affect people in different ways. Some experience digestive issues such as bloating, gas, stomach cramps, or irregular bowel movements. Others may struggle with ongoing fatigue, poor concentration, or low mood with no obvious explanation. Skin conditions like acne, eczema, and inflammation can also be linked to underlying food sensitivities.
Discover Your Food Triggers with a Simple Blood Test
Our at-home Food Intolerance Blood Test measures IgG antibody levels—an immune response that may increase when your body reacts to specific foods. This helps identify potential sensitivities that could be contributing to your symptoms.
We analyse your response to a wide range of everyday foods, including:
- Dairy and grains
- Fruits and vegetables
- Nuts, seeds, and legumes
- Fish and meat
With your personalised results, you’ll gain clear insight into which foods may be affecting your health. This allows you to make targeted changes—whether that’s removing trigger foods, following an elimination diet, or improving your nutrition with professional guidance.
Stop guessing and start understanding your body. With the right insights, you can take control of your diet and feel more energised, focused, and comfortable every day.
A Professional Comes to You
Once you order your test and book your appointment, a qualified professional can visit your home or workplace, or you can choose to visit a clinic to take your blood sample safely and comfortably.
- No self Testing
- Accredited UK lab
Food Intolerance Comprehensive Blood Test
Full IgG profile for 80+ foods (expands to mango, coconut, brazil nut, whey, beef, lamb, pork, turkey, barley, gluten, pecan nut, sunflower seed, candida albicans, lentil, lima bean, green pea, brewer’s yeast, apricot, avocado, blueberry, cranberry, grapefruit, lemon, papaya, pear, pineapple, plum, raspberry, grape, strawberry, watermelon, asparagus, green olive, broccoli, cauliflower, cucumber, green bean, green pepper, red kidney bean, pumpkin, soya bean, spinach, mackerel, rye flour, chickpea, chocolate, coffee, honey, pistachio). Thorough for chronic/complex. (IgG to complete diet: meats, seafood, nuts/seeds, grains/legumes, veg/fungi, fruits/berries, extras like yeast/candida.)
- Best For: Persistent/long-term concerns (e.g., IBS-like, multiple symptoms); full elimination guidance across all groups.
How often should I have a Food Intolerance Blood Test?
Most people only need a Food Intolerance Blood Test once—unless symptoms change.
It’s a smart way to get clarity and adjust your diet confidently.
Can I Use These Results With My GP?
Your results report is designed to be shared with your GP or specialist. It shows your intolerances clearly so you can discuss whether any further tests, treatment, or follow‑up are needed.
Nurse Appointments Fill Up Fast — Book Now To Secure Your Preferred Date.
Our Nurses visit your Home or Work to take your blood.
Pick a time and date to suit you.
Your results are available online within days of your blood being taken.
Other Questions
- Persistent Bloating – Regular abdominal discomfort or swelling after eating.
- Fatigue and Low Energy – Feeling tired despite adequate sleep and rest.
- Brain Fog – Difficulty concentrating or feeling mentally sluggish.
- Digestive Issues – Ongoing constipation, diarrhoea, or stomach cramps.
- Unexplained Headaches or Migraines – Particularly if they occur after meals.
- Skin Problems – Acne, rashes, eczema, or other flare-ups without an obvious cause.
- Mood Changes – Low mood, irritability, or feeling emotionally off without a clear trigger.
- Joint Pain or Stiffness – Especially when accompanied by other systemic symptoms.
- Difficulty Identifying Trigger Foods – When trial-and-error dieting hasn’t worked.
- Long-Term Gut Concerns – Such as suspected IBS or sensitivity to certain foods.
- Desire for Personalised Dietary Guidance – To take the guesswork out of elimination diets.
- Support for Health Goals – Such as clearer skin, better digestion, or improved energy.
- Mango
- Cheese (cheddar)
- Milk
- Coconut
- Brazil nut
- Whey
- Beef
- Chicken meat
- Egg white
- Egg yolk
- Lamb
- Pork
- Turkey meat
- Barley
- Buckwheat
- Corn
- Gluten
- Hazelnut
- Oat
- Rice
- Wheat
- Cod Fish
- Halibut
- Salmon
- Sardine
- Sole
- Trout
- Tuna
- Crab
- Lobster
- Mushroom
- Shrimp
- Almond
- Peanut
- Pecan nut
- Sesame seed
- Sunflower seed
- Walnut
- Candida albicans
- Lentil
- Lettuce
- Lima bean
- Onion
- Green pea
- Brewer’s
- Apple
- Apricot
- Avocado
- Banana
- Blueberry
- Cranberry
- Grapefruit
- Lemon
- Orange
- Papaya
- Peach
- Pear
- Pineapple
- Plum
- Raspberry
- Grape
- Strawberry
- Watermelon
- Asparagus
- Green olive
- Broccoli
- Cabbage
- Carrot
- Cauliflower
- Celery
- Cucumber
- Garlic
- Green bean
- Green pepper
- Red kidney bean
- Potato
- Pumpkin
- Soya bean
- Spinach
- Tomato
- Mackerel
- Rye
- Flour
- Yeast
- Chickpea
- Chocolate
- Coffee
- Honey
- Pistachio
Take the blood test as early as possible if you experience bloating, fatigue, brain fog, or skin flare-ups after eating.
Collection method: Venous blood
Results available: 1-2 days after the sample has reached the laboratory.
IgG as a Biomarker
IgG antibodies are a type of protein made by your immune system. They help your body recognise and remember foreign substances like bacteria, viruses, and even certain foods.
In food intolerance testing, raised levels of IgG antibodies to specific foods may suggest that your immune system is reacting to those foods in a delayed way.
This isn’t a food allergy (which involves IgE antibodies and immediate reactions), but a slower, ongoing immune response.
The Hidden Culprits in Your Diet – Why Food Intolerances Are Sabotaging Your Health
Your immune system flags certain foods with IgG antibodies – a delayed response causing inflammation over time. Common triggers (dairy, wheat, eggs) build up, leading to bloating, gas, cramps, constipation/diarrhoea, fatigue, brain fog, headaches/migraines, skin issues (acne/eczema/rashes), mood swings/irritability, joint pain, or low energy – often misdiagnosed as stress, IBS, or “ageing.”
The misery? Symptoms linger, disrupting meals, workouts, or focus – years of trial-and-error diets without relief. Risks rise with gut conditions, stress, or poor absorption; untreated, it worsens inflammation or nutrient gaps. If you’re veggie/vegan, on meds, or have family sensitivities, test now – IgG reveals patterns for targeted elimination, not restriction.
Stop the cycle – identify, remove, and thrive.
Food Intolerance Signs Stacking Up? When to Test
These delayed reactions hit anyone – spot if they fit:
- Persistent bloating, gas, cramps, or irregular bowels after eating?
- Fatigue/low energy, brain fog, headaches, or poor concentration?
- Skin flare-ups (acne/rashes/eczema), mood changes, or joint stiffness?
- Unexplained weight issues, low mood/irritability, or slow healing?
- Triggers: Restrictive diets, long-term gut concerns, or desire for personalised guidance?
Common in UK (processed foods/stress), but reversible.
Our customers transform:
“Comprehensive pinpointed my wheat – no more daily bloating!” – Sophie K., Bristol.
Conquer Food Intolerances – Simple Plan After Results
IgG insights + symptoms guide an elimination diet (remove suspects 2-4 weeks, reintroduce one-by-one):
- Diet Tweaks: Swap triggers (e.g., dairy-free alternatives, gluten-free grains); focus anti-inflammatory foods (fish, berries).
- Support Steps: Hydrate, probiotics for gut health, track symptoms in a journal.
- Professional Help: Nutritionist/GP for plans; retest if symptoms shift (most once is enough).
- Lifestyle: Stress reduction (yoga), balanced meals to avoid new sensitivities.
Unsure? 70% start with Starter – upgrade if results miss triggers or if you want a deeper dive
(e.g., Advanced for fruits/nuts, Comprehensive for everything). All UK-accredited labs, confidential.
Ease Your Worries – Testing Made Simple
- Basic or Full? Starter for suspects; Advanced/Comprehensive for thoroughness (e.g., if gut/mood chronic).
- Reliable? Venous samples + labs give precise IgG; indicator, not diagnosis – pair with symptoms/GP.
- Diet Changes Daunting? Results include guidance; most see relief in weeks with pro help.
- Privacy/Repeat? Confidential; one-time for most, retest if life changes (e.g., new diet).
Feel lighter – identify your triggers today.
How it Works
Read about Fingerprick VS Venous blood sample 
1. Order a Test
Order your test, and then Answer the Questions about why you’re taking that test.
Our nurse will contact you for dates, so they can take your blood sample at your home.
Our nurse will then send your sample to our laboratory.
2. Our laboratory team run the tests
Our skilled laboratory staff conduct your blood tests in a clean and secure environment, ensuring accuracy and reliability.
Each test follows strict protocols to maintain the highest quality standards.
3. Receive Your Results within 7 days
We will email you to inform you that your blood test results are ready.
The email will have a PDF report attached, sent directly to your inbox.
4. Monitor your levels over time
With regular ongoing tests and reports, you can track your results. The reports can be shared with your GP.
Check if you’re improving healthily or where changes could be made.
