The drink comprises carbonated water, sugar, and citric acid, providing its sweetness and tartness. Taurine (0.4%) and caffeine (0.03%) are included to enhance energy levels. Sodium citrate acts as an acidity regulator, while flavourings contribute to its distinctive cherry taste. Fruit and vegetable concentrates from black carrot and blackcurrant provide natural colouring. Sweeteners like aspartame and acesulfame K are added. Sodium benzoate serves as a preservative. The beverage is fortified with vitamins (Niacin, Pantothenic Acid, Vitamin B6, Vitamin B12) and contains inositol. ​

Boost Energy Sour Cherry does not list any major allergens such as milk, eggs, gluten, nuts, or soy in its ingredients. However, it contains aspartame, a source of phenylalanine, making it unsuitable for individuals with phenylketonuria (PKU). As formulations can change, it’s advisable to check the product label for the most current allergen information before consumption.