A member asked:

What is does it mean for something to be an allergen?

7 doctors weighed in across 3 answers

Triggers allergies: An allergen is any substance, usually a protein but occasionally a carbohydrate, drug or metal, that upon entering the body is perceived by the immune system as being foreign. If the immune reaction results in immediate hypersensitivity like asthma or anaphylaxis or contact dermatitis like poison ivy or poison oak then that foreign substance has acted like an allergen.

Answered 10/3/2016

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It causes allergy: Allergen means to cause an allergic reaction, which means the substance, almost always a protein or a medication, stimulates the production of allergic antibodies (ige) so when the substance is ingested an allergic reaction occurs.

Answered 4/16/2016

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Dr. Alan Ali answered

Specializes in Psychiatry

Allergen: Substance that stimulates an allergic reaction.

Answered 3/14/2019

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