Description
Shellfish Intolerance Test
Do you feel bloated, fatigued, foggy-headed, or unwell after eating fish? It may not be a coincidence. While shell fish allergies are usually immediate and severe, a shell fish intolerance involves a delayed immune response, which means symptoms can appear hours—or even days—after eating. This makes it much harder to identify without testing.
Shell fish intolerance can lead to a range of subtle but persistent symptoms. You might experience ongoing digestive discomfort, bloating, stomach pain, or changes in bowel habits. Others report low energy, fatigue after meals, brain fog, and difficulty concentrating. Skin issues such as acne, rashes, or eczema may also flare up. Because these reactions aren’t immediate, they’re often mistaken for unrelated problems like stress, poor sleep, or general fatigue.
Our shellfish intolerance blood test helps uncover hidden immune reactions by measuring IgG antibody levels to common fish types, including scallop, crab and crayfish. Elevated IgG levels can suggest your immune system is reacting to shell fish proteins, potentially leading to low-grade, chronic inflammation and symptoms that can interfere with daily life.
If you regularly eat shell fish and are dealing with unexplained symptoms, this test can provide clarity. With your personalised results, you’ll be empowered to adjust your diet with confidence—eliminating foods that may be triggering discomfort and supporting better health through informed choices.
Stop guessing. Discover whether fish is affecting how you feel—and take the first step toward a clearer, healthier you.
How often should I have a Shellfish Intolerance test?
You typically only need a Shellfish Intolerance Test once, unless your symptoms change significantly or your diet reintroduces shellfish after a long break.
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 or stomach cramps after eating fish
- Fatigue or feeling sluggish post-meal
- Skin issues like rashes, eczema, or acne
- Brain fog or trouble concentrating
- Headaches or general malaise
- Ongoing digestive issues
- Blue mussel
- Lobster
- Clam
- Oyster
- Crab
- Scallop
- Crayfish
- Shrimp
Take the blood test as early as possible when you feel bloated, fatigued, foggy-headed, or unwell after eating fish.
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.
