In 2012, a study came out that claimed genetically modified corn could promote cancer, and it was quickly retracted by the journal Food and Chemical Toxicology. Why? Because the study itself was flawed. According to Scientific American, the data was incorrectly written, some numbers were faked, and there was a clear bias from the authors. Still, the study raised questions over whether corn carries carcinogens. In 2018, research from UNAM’s Biology Institute noted that processed corn–usually found in tortillas–might have carcinogens. In particular, Mexico’s corn contained some aflatoxins, which appears in some cancer tumors. The scientists claimed that eating antioxidant-rich food can counter this effect.