Diet Coke controversies
Controversies tied to this brand in public sources. A listing is not a finding of fault.
2007
Sodium benzoate and child-behavior debate
A United Kingdom Food Standards Agency report was cited in public debate about possible links between sodium benzoate and attention or behavior in children. The issue contributed to Coca-Cola removing the preservative from Diet Coke sold in the United Kingdom in 2008.
Public criticism of Diet Coke sweeteners and celebrity marketing
Diet Coke has attracted recurring criticism from advocacy groups and commentators concerning aspartame, other additives, and marketing aimed at younger audiences. The cited material records these claims but does not establish that the alleged health effects are scientifically proven.
Debate over aspartame and diet-beverage health effects
Diet Coke has faced recurring public criticism over its use of aspartame. Advocacy groups and commentators have raised concerns involving cancer, appetite, fat storage, and metabolic health. The available reference material records these allegations but does not establish them as settled scientific conclusions.
Criticism of celebrity advertising to younger audiences
The Taylor Swift endorsement generated criticism that celebrity marketing of Diet Coke could reach or influence children. This was a marketing-ethics controversy rather than a product-safety finding.