What are allergens?

Allergens are substances that cause an allergic response. Examples include pollen, molds, and certain foods.

This answer is based on source information from the National Cancer Institute.

Antigens that cause an allergic reaction are called allergens. Some common allergens include bee or insect venom, certain antibiotics, pollen, animal dander, and sulfa drugs.
Lawrence T. Chiaramonte, MD
Allergy & Immunology
Allergens are usually made of proteins from such living things as the skin of animals, referred to as dander, dust, tiny insect parts, mold spores, and pollen. Some of these are perennial, around all the time, and some are seasonal, around only at certain parts of the year. For example, ragweed pollen, a major allergen, is only around in the late summer when the ragweed itself is flowering (although the season is longer in the South than in Northern states), and the air echoes with the sound of sneezing.

Newly mown grass is highly allergenic, so anyone who wants to instill a sense of responsibility in their children by assigning regular chores should try to find another task for kids with allergies.

Cleaning the basement is probably not a good one either because of dust and molds.
Asthma Allergies Children: A Parent's Guide

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Asthma Allergies Children: A Parent's Guide

Asthma and allergies are at epidemic proportions. It doesn't have to be that way. Two experienced pediatric allergists tell everything a conscientious parent needs to know about these conditions,...

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.