High 5 IsoGel Xtreme is a high caffeine Carbohydrate Energy Gel which contains Fruit Juice and Water.Ideally it should be taken just before exercise in order to preload your body with Caffeine. Caffeine helps to increase alertness, concentration and improve endurance performance. As well as Caffeine, each sachet also contains 23g of Carbohydrate, an excellent energy source.Easy to carry and open, High 5 IsoGel Xtreme is a fresh tasting gel with a consistency similar to a sports drink. You do not need to take water with this gel. To ensure hydration during an event High 5 recommend drinking Zero.Due to the high caffeine content, High 5 do not recommend consuming IsoGl Xtreme during your event. Instead they advise drinking Isogel Plus.High 5 IsoGel Xtreme Gels fit into the High 5 Gel Belt and Race Belt.