PVPP is a commonly used clarifier in beer production. It is an odorless, tasteless, and colorless synthetic polymer that is added to beer to improve its clarity and stability. The function of PVPP is to combine with the proteins, tannins and polyphenols present in the beer, and the large particles precipitate out of the liquid, leaving a more watery beer.
The use of PVPP in beer ensures that commercial breweries can produce consistently fresh beer. It also helps prevent odors caused by oxidation of compounds accessible to PVPP. By adding PVPP, beer can stay fresher and more stable for longer.