Millions of MadeGood granola bars are being recalled due to the "potential presence of a piece of metal in the product." The FDA recently raised the risk category to Class II.

Chicago-based Riverside Natural Foods voluntarily recalled certain batches of its granola bars due to potential metal contamination on Dec. 10.

The agency is warning that the bars have a "potential presence of metal."

The FDA is warning customers of adverse side effects of over 2.4 million cases of MadeGood granola bars sold nationwide, including in NJ.

MadeGood granola bars that came in a variety of flavors. On Feb. 11, the FDA reclassified the recall to make it a Class II designation. A Class II designation means the recall is “a situation in which use of or exposure to a violative product may cause temporary or medically reversible adverse health consequences or where the probability of serious adverse health consequences is remote.