Diet Pepsi is made with carbonated water, colour (Caramel E150d), phosphoric acid, sweeteners (Aspartame, Acesulfame K), natural flavourings including caffeine, acidity regulator (Sodium Citrate), and preservative (Potassium Sorbate). The combination of carefully selected natural flavours and sweeteners creates the distinctive crisp and refreshing taste, without the need for sugar.

Diet Pepsi PMP 6 × 2ltr contains no major allergens such as milk, eggs, nuts, gluten, or soy. However, it does contain a source of phenylalanine due to the presence of aspartame. This is important information for individuals with phenylketonuria (PKU). Consumers should always check the packaging for the latest allergen and ingredient information.