Lab test

Lettuce Allergy Test - Food Allergies

A lettuce allergy test uses a blood sample to measure allergen-specific IgE antibodies against lettuce proteins.

Typical price

From $49

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

A lettuce allergy test uses a blood sample to measure allergen-specific IgE antibodies against lettuce proteins. Lettuce allergy is uncommon, and some reactions to it have been linked to proteins that also appear in pollen and certain other plants. The test is a screening tool for suspected food allergy, not a diagnosis on its own. A provider may order it after a reaction to lettuce or salads, or as part of a broader vegetable allergy evaluation. Results are interpreted alongside symptoms, timing, and medical history.

• Lettuce-specific IgE Antibodies produced against lettuce proteins; used to assess sensitization to lettuce.

• People who develop hives, itching, or swelling after eating lettuce
• Individuals with tingling or itching in the mouth after salads or lettuce
• Those with digestive upset, nausea, or diarrhea after lettuce
• People with eczema or skin reactions who suspect a vegetable trigger
• Anyone with pollen allergy and reactions to fresh vegetables

• No fasting is required for this IgE allergy test
• The blood sample can be collected at any time of day
• Tell the provider about all medications you take
• No special diet is needed beforehand

Results are reported as an IgE level or class for lettuce. An elevated value may indicate sensitization, but sensitization does not always mean a person will react when eating lettuce. A low or undetectable level makes a true lettuce allergy less likely, though it does not rule one out. Some plant proteins cross-react with pollen, so a provider may consider pollen-related food sensitivity. Discuss all results with a healthcare provider before changing your diet.

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