The PLUS and X’TREME range of High5 products contain Caffeine (all other products do not). The Plus products contain a moderate dose of Caffeine, while the X’treme products contain a higher dose. Even in moderate doses, Caffeine can improve sports performance. Athletes use caffeine for caffeine loading prior to or during a major race, towards the end of a long ride, before or during training for attention and concentration and to increase reaction time. To benefit from caffeine you must use it correctly based on your bodyweight. Step-by-step guidelines on the use of Caffeine are provided in the High5 Faster & Further Guides. Research indicates that when taken in moderation, Caffeine does not significantly add to dehydration during an event.