Diet Pepsi is a zero-calorie cola beverage from The Pepsi Cola Company. It comes in a wide range of sizes and a few flavor variations such as vanilla, wild cherry, and lime.

Diet Pepsi is artificially sweetened with aspartame and ace k.

It has come to our attention that Diet Pepsi has a different formulation in the UK and other markets and thus has a lower caffeine content there. It contains 42.6mg per 12 ounce (355ml) can.