How do I know Pro Plan LiveClear is safe for my cat?

In fact, the cat will continue to produce allergens and shed as normal. The key ingredient in Pro Plan LiveClear, a specific protein found in eggs, simply binds to the allergen in cats’ saliva and neutralizes it, safely, in the cat’s mouth. The action happens in the cat’s mouth, but once swallowed, the ingredient is digested like any other protein.