Description
Nut Intolerance Blood Test
If you experience bloating, fatigue, brain fog, or skin flare-ups after eating nuts, it might not just be a sensitivity—it could be a sign of nut intolerance. This is different from a nut allergy, which causes immediate and sometimes severe reactions. Nut intolerance involves a delayed immune response to proteins found in nuts such as peanuts, almonds, walnuts, and hazelnuts. Because symptoms can take hours or even days to appear, it can be difficult to connect the dots without testing.
A nut intolerance blood test measures IgG antibodies in your blood to determine if your immune system is reacting to specific nut proteins. Elevated IgG levels may suggest that your body sees these foods as a threat, potentially triggering chronic inflammation. This immune reaction can lead to symptoms like digestive discomfort, low mood, tiredness, skin problems like eczema or breakouts, and even joint pain or brain fog.
Knowing whether nuts are contributing to your symptoms can help you take control of your health. With clearer insights into how your body responds to what you eat, you can make confident, informed changes to your diet—and start feeling clearer, lighter, and more balanced.
Don’t guess—get answers. Discover whether nut intolerance is holding you back from feeling your best.
How often should I have a Nut Intolerance Blood Test?
Most people only need a Nut Intolerance Blood Test once—unless symptoms change or nuts are reintroduced after a long break.
It’s a smart way to get clarity and adjust your diet confidently.
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
- Bloating
- Excessive gas or wind
- Stomach cramps or discomfort
- Nausea
- Constipation or diarrhoea
- Fatigue or low energy
- Brain fog or difficulty concentrating
- Irritability or mood swings
- Headaches
- Skin issues, such as acne, eczema, or rashes
- Joint pain or stiffness (in some cases)
- Almond
- Peanut
- Brazil nut
- Pecan nut
- Cashew nut
- Pine nut
- Chestnut
- Pistachio
- Coconut
- Sesame seed
- Hazelnut
- Walnut
- Macadamia nut
Take the blood test as early as possible if you experience bloating, fatigue, brain fog, or skin flare-ups after eating nuts.
Collection method: Venous blood
Results available: 1-2 days after the sample has reached the laboratory.
IgG as a Biomarker
IgG (Immunoglobulin G) is an antibody that signals your immune system has been exposed to certain foods. In food intolerance testing, raised IgG levels may suggest your body is reacting to those foods, potentially causing delayed symptoms like bloating, fatigue, or skin issues. While not a diagnosis on its own, IgG is a helpful marker for identifying possible food sensitivities when reviewed alongside your symptoms and dietary habits.
How it Works
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.
