The FDA is cracking down on companies that are lying about selling 100% Parmesan cheese The FDA is warning pasta and pizza lovers that cheese labeled “100 percent Parmesan†are often filled with cheese substitutes—like wood pulp. Yes, you’ve been eating wood, thanks to companies like Castle Cheese, which produced Parmesan cheese containing no actual Parmesan for almost 30 years. The president of the company, which supplied megastores like Target, is scheduled to plead guilty this month to charges that carry a sentence of up to a year in prison and a $100,o00 fine, according to Bloomberg.