Test library
Lobster Allergy Test
The Lobster Allergy Test measures IgE antibodies to lobster proteins in a blood sample, helping assess whether a person has become sensitized to this crustacean shellfish.
Order Lobster Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Lobster Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Lobster Allergy Test is a blood test that looks for IgE antibodies directed at lobster. Lobster belongs to the crustacean group of shellfish, along with shrimp, crab, and crayfish. Allergic reactions to shellfish can range from itching and hives to more serious symptoms, and the test helps determine whether lobster specifically is a trigger. It is interpreted together with the person's reaction history and other allergy findings.
What this test measures
Allergen-specific IgE is the antibody linked to immediate allergic reactions. When the immune system identifies proteins in lobster as a threat, it can produce IgE that binds to them. The laboratory measures how much lobster-specific IgE is present, which shows whether sensitization has occurred. Sensitization does not automatically equal symptoms, so the result is read alongside the clinical history.
A single blood draw is used, so no skin pricking is required. Results are usually reported as a quantitative concentration in kilounits per liter with a graded antibody class. Shellfish tropomyosin is a major cross-reactive protein, so a person sensitive to lobster may also react to shrimp, crab, or mollusks such as clams; some orders include those related allergens for a fuller picture.
People with a history of reactions after eating shellfish, or those who have never eaten lobster but react to other crustaceans, may order this test. It can also be added to a broader food allergy panel. A qualified healthcare provider should interpret the result with the person's symptoms, other allergen results, and medical history.
- Lobster-specific IgE antibodies
- Quantitative sIgE concentration reported in kilounits per liter
- Graded allergen-specific IgE class
- Total serum IgE when included
- Tropomyosin cross-reactive shellfish markers when included
- Shrimp and crab IgE when a shellfish panel is included
Why people order this test
- Clarify whether lobster is part of a suspected shellfish allergy
- Follow up after a reaction to lobster or another crustacean
- Check for cross-reactivity within the shellfish group
- Add lobster to a broader food allergy assessment
- Support avoidance planning with a clinician
How to prepare
No fasting is required for this blood test. Follow the collection instructions provided by the laboratory, and tell the testing provider about any medications you take, because some can affect allergy test interpretation.
Understanding your results
Results are typically available within one to three business days. A detectable lobster-specific IgE level indicates sensitization; whether it causes symptoms depends on the person, so a qualified healthcare provider should explain the finding in context.
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Frequently Asked Questions
What does the lobster allergy test measure?
It measures IgE antibodies to lobster proteins in a blood sample. The result shows whether the immune system has been sensitized to lobster.
Is lobster allergy the same as shellfish allergy?
Lobster allergy is one form of shellfish allergy. Shellfish also includes shrimp, crab, crayfish, and mollusks such as clams and mussels.
Can I be allergic to lobster but eat shrimp safely?
Cross-reactivity is possible because shellfish share proteins such as tropomyosin. Whether a person reacts to other shellfish is best discussed with a qualified healthcare provider.
Does a positive result mean I will have a severe reaction?
No. The test shows sensitization, not the severity of any future reaction. Severity is assessed from the clinical history and other findings.
Is a blood test as useful as a skin test?
Both approaches detect allergen sensitization and each has advantages. A qualified healthcare provider can help decide which method suits the situation.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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