Food Babe is where I get a lot of my food information. She posted this about Starbucks... which made me look up caramel coloring in our food. Evidently it's everywhere. Coke and Pepsi said they'd remove it from their products (to a level that's less potentially harmful, because they don't want to have to put a "may cause cancer" sticker on their cans in California), but as far as I know Pepsi still Pepsi still contains too much carcinogens.
I find it interesting that in the article above they say "Consumers need to be aware of the big picture: Even water can be toxic in unhealthy amounts -- or vitamins or fiber."
The Food and Drug Administration says that a consumer would need to consume more than 1,000 cans of soda every day to reach the doses linked to cancer in rodent studies.
That may be true. But how many other food items have the caramel coloring in them? And combined with other additives? Who knows?
Here is a link that might be useful: Sabotaged at Starbucks