What's in This?: Cheez Whiz - MEL Magazine It's probably added to Cheez Whiz as a thickening agent. 8) Salt: For flavor. 9) Lactic Acid: Lactic acid is another sugar added for acidic flavoring. It's the main sugar in milk and can also be used to speed up the coagulation process of cheeses. 10) Whey Protein Concentrate: Whey protein concentrate is usually added to processed cheese ...