Question

why is that the Caramel in coca cola causes cancer?

Answer 1

Because it probably has some ingeredients that cancer doesn't take kindly to.

Answer 2

i found this helpful para in a link hope it helps

You already know that you shouldn’t glug soda by the gallons. But here’s a new concern you probably didn’t think of: the caramel coloring they’re made with—the stuff that turns regular and diet sodas that characteristic shade of brown—contains potential cancer-causing compounds, according to new research by the Center for Science in the Public Interest (CSPI).

Answer 3

During the manufacturing process, the caramel is exposed to some toxic carcinogens... Good thing I don't drink soda ;)

http://www.chicagotribune.com/business/breaking/chi-coke-pepsi-changing-their-caramel-20120309,0,6389104.story