This summer, a research arm of the World Health Organization (WHO) classified the artificial sweetener aspartame as “a possible carcinogen to humans,” finding “limited evidence” that it may cause liver cancer. But another WHO report found that aspartame is generally safe in typical quantities (the WHO’s acceptable intake is the equivalent of a 150-pound person drinking nine to 14 cans of diet soda a day). The Food and Drug Administration (FDA) responded that “FDA scientists do not have safety concerns when aspartame is used under the approved conditions.” The American Cancer Society also weighed in. “The science is still evolving,” said William Dahut, MD, the group’s chief scientific officer. “But we recommend people…review their overall dietary intake, including processed meat and alcohol, known carcinogens associated with increased risk of cancer.”