Something fishy? Counterfeit foods enter the U.S. market

From USA Today:

Some of your favorite foods may be fakes.

Foods masquerading as something else - a more nutritious something else - have been big news in the past two years. Chinese food companies in particular have been blamed for making deadly alterations to dairy, baby and pet foods by adding melamine. The chemical makes it appear that the food or beverage has the required level of protein.