What is the mechanism by which PVPP (polyvinylpolypyrrolidone) stabilizes beer, and what specific compounds does it target for removal?

PVPP (polyvinylpolypyrrolidone) stabilizes beer by selectively adsorbing polyphenols, which are a primary cause of haze formation in beer. Haze is the cloudiness or lack of clarity in beer, which is often undesirable from a consumer perspective. Polyphenols, also known as tannins, are complex molecules derived from malt and hops. They contribute to the flavor and mouthfeel of beer but also have a tendency to bind with proteins, forming large, insoluble complexes that cause haze. This haze can develop during cold sto....