Diet Pepsi is made using carbonated water, colour (Caramel E150d), phosphoric acid, sweeteners (Aspartame, Acesulfame K), natural flavourings including caffeine, acidity regulator (Sodium Citrate), and preservative (Potassium Sorbate). The carefully balanced combination of natural flavourings and sweeteners provides a clean, crisp taste with a satisfying cola finish — all without the sugar.

Diet Pepsi PM 500ml contains no major allergens such as milk, eggs, gluten, soy, or nuts. However, it does contain a source of phenylalanine due to the use of aspartame as a sweetener. This is important for individuals with phenylketonuria (PKU). As always, consumers should check the label for the most up-to-date ingredient and allergen information.