In a recent study of best-selling grocery store products, researchers discovered that almost 50 percent of the sampled peanut butter and deli meats, as well as turkey, fish, beef and other fatty foods, contained hints of a flame retardant normally utilized in the foam insulation of building walls.

Arlene Blum, executive director of the Green Science Policy Institute, suggested "They could migrate out of products into dust and end up in sewage sludge. The chemical may then end up in the marine food supply, or the sewage sludge could get put on fields, where it will inevitably contaminate crops and livestock." Essentially, these chemicals cannot be used in any circumstance without the risk of contaminating food sources.

Read more: Flame retardants found in common grocery store foods