An allergen is something that causes allergies in humans.
Dust, pollen and pet dander are all common allergens. It is possible to be allergic to anything from chlorine to perfume. Food allergies are not as common, but some foods, like peanuts, nuts, seafood and shellfish cause serious allergies in lots of people.
Some common allergens could be:
- Animal products
- Insect stings
- Mold spores
- Plant pollens (hay fever)
- Bublin M; Radauer C; Wilson IBH; Kraft D; Scheiner O; Breiteneder H; Hoffmann-Sommergruber K (2003), "Cross-reactive N-glycans of Api g 5, a high molecular weight glycoprotein allergen from celery, are required for immunoglobulin E binding and activation of effector cells from allergic patients", FASEB, 17: 1697–1699