It is an anti-allergen, aqueous solution containing a powerful & safe active ingredient. This substance is derived from naturally occurring extracts found in the bark of certain trees and plants. It works by instantly deactivating the allergen Der p1 and Der p2 in dog and cat dander, dust mite bodies, and house dust mite and cockroach droppings by denaturing and substantially reducing the 1gE antibody-binding capacity of this allergen. As a result they are no longer "recognized" by the body's immune system and they do not bond with the antibodies sent to destroy them. This bonding process is the cause of the body's allergic response (the allergy attack). In effect, an over-reaction of the immune system producing the distress symptoms that, in extreme cases, can pose a threat to life. The results are fast and last up to six months.