You might want to think twice about heading to Dunkin’ Donuts for a box of Munchkins. The high temperature (greater than 248 degrees Fahrenheit) used to make donuts causes the formation of acrylamide, a carcinogenic chemical that is also found in cigarettes, dyes, and plastics. “I estimate that acrylamide causes several thousand cancers per year in Americans,” said Clark University professor Dale Hattis. Sadly, potato chips and French fries are also heated to a temperature above 248 degrees Fahrenheit, making them a major cancer concern.