Cod Allergy Test (IgE): What Your Result Means

Cod Allergy Test (IgE) — Detect Fish Protein Sensitivity

Cod allergy is triggered by parvalbumin, a protein found in cod and many other fish species. Because parvalbumin is heat-stable, cooking does not eliminate the allergen. Reactions can include skin symptoms, gastrointestinal distress, respiratory problems, and in severe cases, anaphylaxis. This test measures IgE antibodies specific to cod to confirm or rule out an allergy.

Why Test Cod Allergy?

Testing is recommended if you experience allergic reactions after eating fish, particularly cod. Since parvalbumin is present in many fish species, a positive result may also indicate a broader fish allergy. The test helps guide dietary decisions and allergy management.

What Do High Cod Allergy Levels Mean?

Elevated IgE levels suggest an allergy to cod. Due to cross-reactivity of parvalbumin across fish species, a positive result may also indicate sensitivity to other fish such as salmon, herring, or mackerel.

What Do Low Cod Allergy Levels Mean?

Low or negative IgE levels make cod allergy unlikely. If you still experience symptoms after eating fish, other fish species or shellfish allergens should be investigated separately.

Symptoms to Watch For

Hives or skin rash after eating fish
Swelling of lips, tongue, or throat
Nausea, vomiting, or abdominal pain
Nasal congestion or sneezing when cooking fish
Wheezing or breathing difficulties
Tingling in the mouth or throat

Who Should Get Tested?

People who react to fish or seafood
Those with a history of allergic reactions after eating cod
Individuals who want to check for cross-reactivity with other fish species
Parents of children with suspected fish allergy

How to Prepare for Your Test

No special preparation is required. No fasting needed. Bring your ID to the sampling location. Bring valid ID to your appointment.

Order Your Blood Test

Test your Cod Allergy levels with an accredited Swedish laboratory. Results within days, reviewed by Wellth.

Fish Allergy Test →

Frequently Asked Questions

If I am allergic to cod, am I allergic to all fish?

Not necessarily, but parvalbumin is shared across many fish species, making cross-reactivity common. Further testing can determine which fish you may tolerate.

Can cooking eliminate the cod allergen?

No. Parvalbumin is heat-stable and survives cooking, frying, and baking. If you are allergic to cod, you should avoid it regardless of preparation method.

Is fish allergy the same as shellfish allergy?

No. Fish and shellfish allergies are caused by different proteins. Being allergic to cod does not necessarily mean you are allergic to shrimp, crab, or lobster.

Reviewed by

Wellth Team

Wellth

Our content is written and reviewed by Wellth, and fact-checked against peer-reviewed research and current Swedish clinical guidelines.

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Medical Disclaimer

The information on this page is provided for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Wellth provides health information and testing services but is not a substitute for clinical care. Always consult a qualified healthcare provider if you have questions about a medical condition. If you are experiencing severe or urgent symptoms, contact your doctor or call 1177 Vårdguiden. Blood test results should be interpreted by a qualified healthcare professional in the context of your complete medical history.