The Center for Science in the Public Interest wants the chemical used to give sodas their caramel color banned.
A study published in the journal Toxicological Sciences found that caramel color reduced the immune function in lab animals.
CSPI says the coloring is contaminated with cancer causing chemicals and is asking the Food and Drug Administration to ban it.
The American Beverage Administration says there is no evidence the coloring causes cancer in humans and the petition is nothing more than another attempt to scare consumers.
