LOUISVILLE, Ky. (WHAS11) -- Before you grab another soda there is a warning for you as the FDA is now investigating the caramel coloring used in them.
A “Consumer Reports” study tested dozens of products and found that some soft drinks had the chemical "4-mel" in abnormally high levels.
Past studies have been inconclusive about whether 4-mel can cause cancer but one test in 2007 found that the chemical popular in soft drinks did cause mice to develop tumors.
Up until now the FDA has said that 4-mel poses no health risk to humans. Now the agency will be reviewing its safety.
The study found that some Pepsi products had alarmingly high concentrations of 4-mel.
A spokesperson for Pepsi Co. said the company is "extremely concerned" about the study and thinks it's factually incorrect.