Both Coca-Cola and Pepsi Cola are altering the recipe of their caramel colour across the US, to avoid having to label the product with a cancer warning.
In a move to comply with new Californian regulations, both companies are changing an additive called 4-methylimidazole (4-MI or 4-MEI), which has been targeted by consumer group Center for Science in the public interest, claiming the chemical causes cancer.
The change has already been implemented in the state of California and will be brought in across the US soon. It is unclear whether it will happen here in the UK.
The Coca-Cola company have directed their caramel supplier to modify their production process to reduce the level of the additive.
The actual fomula of the drink is kept secret, and is rumoured to be guarded 24-hours a day in a vault in Atlanta.
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