Overstims 30 g. Cafein'Gel contains natural caffeine from guarana and coffee for a real stimulating action and an instant energy source during intense physical exertion. Cafein'Gel is used during physical exertion, at any time to reconstitute maximum energy as fast as possible (difficulty, climbing a col,..) and give you again maximum efficiency. Cafein'Gel is also very adapted for activities which require vigilance and concentration (night competitions,...).