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      Bloggers start food fight over Kraft Mac and Cheese

      The box on the left is the American version of Kraft's Mac and Cheese, while the one on the right is the European version, which is colored naturally.

      Two North Carolina food bloggers are getting national attention after petitioning Kraft to remove food coloring from it's popular Mac and Cheese.

      The bloggers started investigating U.S. products using additives that are banned in other countries.

      They made Mac and Cheese a mission, starting with Kraft - one of the largest U.S. based food companies.

      The Kraft European version is colored naturally with paprika and beta carotene.

      Vani Hari, one of the food bloggers, says the version in the United States - which is usually geared towards children - uses petroleum based dyes that are made in a laboratory. The dyes used are yellow number 5 and number 6.

      In Europe, those two ingredients require a warning label.

      The petition has received tens of thousands of signatures.

      Kraft posted a letter saying the FDA has approved both dyes and reminding customers that the company does offer serveral versions in the U.S. that are colored naturally.