7. Canned Tomatoes
The linings of many canned foods contain bisphenol A (BPA), a chemical linked to various forms of cancer, heart disease, and intestinal damage. Canned tomatoes, however, are particularly dangerous as their high acidity causes the BPA to leech from the lining of the can into the tomatoes. The FDA approved bisphenol A in the 1960s. While the compound has been linked to cancer and other serious health issues, studies have been inconclusive. Nevertheless, a report published in 2013 by the Proceeding of the National Academy of Sciences says that BPA alters the way genes work inside the brains of rats.