Oct 15, 2025 · Allergens are substances that cause an allergic reaction. Learn about the different types of allergens, how they work, and the risks they pose.

An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response. In technical terms, an allergen is an antigen that is capable of …

Jan 1, 2025 · As a result, the immune system reacts by making a type of antibody called immunoglobulin E (IgE) to defend against the allergen. This reaction leads to allergy symptoms.

Aug 24, 2024 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom and pet …

Allergens may be naturally occurring or of synthetic origin and include pollen, mold spores, dust, lint, animal dander, insect debris, foods, blood serum, and drugs.

An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. For instance, if you have an allergy to pollen, your immune …

Mar 31, 2024 · An allergy is an immune response or reaction to substances that are usually not harmful. Allergies are very common. Both genes and environment play a role. If both your parents have …