The drink comprises water, glucose-fructose syrup, and citric acid, providing its base and tart flavour. It also contains mineral salts such as sodium chloride, potassium citrate, calcium lactate, and magnesium chloride, which help replenish electrolytes. The product includes added flavourings and preservatives such as potassium sorbate and dimethyl dicarbonate to enhance its shelf life. It is sweetened with aspartame and acesulfame K, and contains vitamin B6. Additionally, the product contains acacia gum as a stabiliser and brilliant blue as a colourant. ​

Boost Isotonic Sport Tropical Berry 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.