The ingredients in Monster Energy Drink Reserve Watermelon 12 × 500ml include:
Carbonated Water, Sucrose, Glucose Syrup, Taurine (0.4%), Citric Acid, Flavourings, Acidity Regulator (Sodium Citrates), Panax Ginseng Root Extract (0.08%), Preservatives (Potassium Sorbate, Sodium Benzoate), L-Carnitine L-Tartrate (0.04%), Caffeine (0.03%), Maltodextrin, Sweetener (Sucralose), Vitamins (B3, B6, B2, B12), Sodium Chloride, Inositol, Colours (E129, E133).

Monster Energy Drink Reserve Watermelon 12 × 500ml is free from common allergens, including celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, nuts, peanuts, sesame, soya, sulphur dioxide/sulphites. It is also free from genetically modified ingredients. However, it contains high levels of caffeine (32mg/100ml) and is not recommended for children, pregnant or breastfeeding women, or individuals sensitive to caffeine.