Viper Extreme is a stimulant version of Maximuscle's best-selling sports drink, Viper. Contains L-Carnitine, taurine, glucuronolactone, bitter orange peel, potassium and magnesium gluconate and caffeine, to improve mental performance and boost energy levels in as little as 15 minutes. Ideal for weight trainers, sports players, clubbers and shift workers. Not suitable for persons under the age of 16 years.