Powerbar Caffeine BoostMany athletes, such as IRONMAN Sebastian Kienle, trust on the benefits of caffeine in their training and competition. Low doses can give you a mental push and with higher doses of 3 4 mg per kilogram body weight you can even increase your endurance performance. Product details 200 mg caffeine per 25 ml ampoule from various sources such as mate tea and guarana extracts Caffeine is used for short term physical performance Only 0,6 g sugar per shot Free