The frozen pizza industry has a problem on its hands: in the face of health and "real food" trends, frozen pizza may be suffering from a processed food stereotype.

The gluten-free market is cementing its staying power as more than a mere dietary fad and continues to make national headlines, including a recent announcement by popular foodservice chain Pizza Hut that it will begin offering gluten-free pizza. In the retail sector, sales of gluten-free foods posted an impressive compound annual growth rate (CAGR) of 34% over the five-year period ended in 2014, when market sales reached $973 million, according to market research publisher Packaged Facts in the recently released report Gluten-Free Foods in the U.S., 5th Edition.

Market research company Euromonitor International released the Top 50 Billionaire Brands list for packaged food in 2014, reviewing packaged food company performance over the last decade.