Cancer has been linked to countless triggers from pesticides to cigarettes to ingredients found in soda. The artificial sweetener aspartame's controversial connection to cancer has long been debated since Coca-Cola first added it to Diet Coke in 1983. And recent issues with 4-MI (also 4-MEI), found in the artificial color added to Coca-Cola and other popular brands of soda products, have forced the company to make major shifts in order to avoid adding a cancer warning to products' labels.

2011 has not been off to the most effervescent start for the soda industry. The latest fizzle comes by way of a recent study presented at the American Stroke Association's International Stroke Conference, suggesting that daily diet soda drinkers have at least a 60 percent increased risk of having a stroke or heart attack compared with non-soda drinkers.

The Center for Science in the Public Interest (CSPI) has submitted another blow to the soda industry in a petition with the FDA to ban ingredients commonly known as "caramel coloring" found in many sodas and snack food items due to the increased risk of cancer caused by these colorants.