For those aspiring to eat mainly “clean ingredients,” a little chemistry knowledge is often useful for deciphering packaged food labels. Late last year the maker of Orville Redenbacher’s popcorn was ...

Potassium sorbate is a preservative used in different packaged foods to help prevent spoilage by microorganisms, namely fungi, such as yeast or mold, and certain bacteria. “Potassium sorbate is used ...