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Viper Boost caffeine energy bars are an advanced sports snack that contains a blend of nutrients to help to enhance mental focus and alertness during exercise. The first and only endurance fuel bar on the market with stimulating caffeine, it also provides carbohydrate to fuel your training session and re-energise your power output. Formulated using the latest sports science research, Viper Boost bars are a delicious, dark chocolate and apricot cereal snack option and being soft and moist in texture; the ideal option during a long ride or run. Whether you eat one immediately before exercise or during training and events, smart sports nutrition is key to you achieving a new personal best!