Allergen

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.

 Common allergens 
Some common allergens could be:
Animal products
Fel d 1 (cat allergy)
fur and dander
cockroach calyx
dust mite excretion
Drugs
penicillin
sulfonamides
salicylates (also found naturally in numerous fruits)
local anaesthetics
Foods
celery and celeriac 
corn or maize
eggs (typically albumen, the white)
fruit
pumpkin
legumes
beans
peas
peanuts
soybeans
milk
seafood
sesame
soy
tree nuts
pecans
almonds
wheat
Insect stings
bee sting venom
wasp sting venom
mosquito stings
Mold spores
Other
latex
metal
Plant pollens (hay fever)
grass — ryegrass, timothy-grass
weeds — ragweed, plantago, nettle, artemisia vulgaris, chenopodium album, sorrel
trees — birch, alder, hazel, hornbeam, aesculus, willow, poplar, platanus, tilia, olea, Ashe juniper

 References 

Category:Allergies
Category:Physiology