from news.sky.com: Coca-Cola and Pepsi are changing the recipes for their soft drinks to avoid being forced by law to put a cancer warning on the label. The caramel colouring in the drinks will contain lower levels of 4-methylimidazole, which has been added to the list of carcinogens in California law. Coca-Cola’s recipe is being changed across the US – but will not be changed in Britain or the rest of Europe.