Coca-Cola and PepsiCo account for nearly 90% of the US fizzy drink market and a large portion of the international market.
Coca-Cola and Pepsi are changing the recipes for their drinks to avoid being legally obliged to put a cancer warning label on the bottle.
An independent study commissioned by the Center for Science in the Public Interest (CSPI) uncovered 4-methylimidazole, or 4-MI, in Coke, Diet Coke, Pepsi and Diet Pepsi at levels 4.8 times greater than those allowed in beverages in California.
4-MI is a byproduct of the reaction that produces the caramel coloring in brown sodas. The chemical has been found to be carcinogenic in animal studies.
The state of California has banned 4-MI in any amount that could potentially lead to one cancer case in 100,000 people. However the levels found in these 4 leading Cola brands indicated a lifetime risk of 5 cancers out of 100,000, assuming that people drink one soft drink per day. That risk rises to 10 cancers out of 100,000 people who drink only soft drinks containing caramel coloring.