Diet Coke, like most food and drink, is harmless in moderation - but the artificially sweetened beverage can cause negative effects just one hour after drinking.
It comes as a common sweetener used in Diet Coke is set to be declared as potentially cancerous next month by the World Health Organisation (WHO).
The sweetener, known as aspartame, will be listed as "possibly carcinogenic to humans" for the first time. Aspartame is found in a range of products, including Diet Coke and Fanta Zero, as well as Wrigley's Extra chewing gum.
