Coca-Cola Zero Sugar is carefully formulated to provide the signature Coca-Cola taste with no sugar. The ingredients are:
Carbonated Water, Colour (Caramel E150d), Phosphoric Acid, Sweeteners (Aspartame, Acesulfame K), Natural Flavourings (including Caffeine).
A blend of sweeteners is used to achieve the familiar flavour while keeping the drink calorie-free.

Coca-Cola Zero Sugar contains no allergens as defined by UK food labelling regulations. It is suitable for people avoiding gluten, dairy, nuts, and other common allergens. However, it does contain caffeine, which some individuals—such as children, pregnant women, or those sensitive to stimulants—may wish to limit. It also contains aspartame, a source of phenylalanine, and should not be consumed by people with phenylketonuria (PKU).