Complex sentence: It is currently believed that they function by stabilizing protein structures through preferential exclusion from the water layers on the surface of hydrated proteins which favors the native conformation and displaces inorganic salts which cause misfolding.
Split into simpler sentences: It is currently believed that they function by stabilizing protein structures by promoting preferential exclusion from the water layers on the surface of hydrated proteins. This favors the native conformation and displaces inorganic salts that would otherwise cause misfolding.