It is due to a manufacturing glitch that might have left metal fragments in some of the packages. Consumers can find out if their cereal is contaminated by checking the UPC code on the box, then cross-checking it with the contaminated codes listed on the Kellogg's website.

The contaminated boxes have "used by" dates between April 1, 2012 to Sept. 21, 2012.

This is the second recall Kellogg's has issued in the past two years. In 2010, Kellogg's recalled Fruit Loops, Apple Jacks, Corn Pops and Honey Smacks because of a weird smell and packaging snafu.

Their latest recall will set them back an estimated $30 million, according to the Wall Street Journal.

For more information, you can go to www.kelloggs.com.

Nate Chisholm contributed to this report 

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