Hypoallergenic, meaning "below normal" or "slightly" allergenic, was a term first used in a cosmetics campaign in 1953. It is used to describe items (especially cosmetics and textiles) that cause or are claimed to cause fewer allergic reactions. Hypoallergenic pets still produce allergens, but because of their coat type, absence of fur, or absence of a gene that produces a certain protein, they typically produce fewer allergens than others of the same species. People with severe allergies and asthma may still be affected by a hypoallergenic pet.
The term lacks a medical definition, but it is in common usage and found in most standard English dictionaries. In some countries, there are allergy interest groups that provide manufacturers with a certification procedure including tests that ensure a product is unlikely to cause an allergic reaction, but such products are usually described and labeled using other but similar terms. So far, public authorities in no country provide an official certification that an item must undergo before being described as hypoallergenic.
The cosmetic industry has been trying for years to block an industry standard for use of the term; in 1975; the USFDA tried to regulate the term 'hypoallergenic", but the proposal was challenged by cosmetic companies Clinique and Almay in the United States Court of Appeals for the District of Columbia, which ruled that the regulation was invalid. Thus, cosmetic companies are not required to meet any regulations or do any testing to validate their claims.
"Hypoallergenic pets" are breeds of pet animals (e.g., some breeds of dogs) that are less likely to trigger allergic reactions in people who are sensitized to the pet species (e.g., in people generally allergic to dogs).
With regard to allergy sufferers, a hypoallergenic pet would presumably enable them to have a pet in their home, whereas most dogs, cats, rabbits, and other fur-bearing animals can cause an allergic reaction. The proteins that cause allergies are found not only in the animals' fur or hair but also in saliva, urine, mucous, and hair roots and in the dander sloughed from the animals' skin. Thus, the widespread idea that "hypoallergenic pets" are those that have less hair or shed less is a myth.