Situation You eat Parmesan cheese.
Status Before eating meat, you must wait six hours (or whatever is your custom to wait between eating meat and dairy).
Note Parmesan cheese is the only commonly available cheese that is considered hard enough to require waiting six hours after eating it before you eat meat-containing foods.
Note Parmesan cheese requires this waiting period even when the cheese is finely ground or is melted on pizza, mushrooms, or other foods.