Alpecin Caffeine ShampooStimulates the hair roots during the hair wash.- Strengthens weakened hair roots.- Prevents hereditary hair loss.The shampoo that stimulates hair growth directly at the roots.A daily hair wash with C1 immediately provides the hair roots with the activating ingredient. Alpecin Caffeine is very well detectable after being left on for as little as 120 seconds.If left on for longer, more caffeine will be absorbed into the scalp.By intentionally doing without any softeners (e.g. silicone), your hair will immediately have more grip.Information for competitive athletes: Alpecin Caffeine can be detected in hair follicles.Please read product leaflet carefully before use. Please read leaflet carefully. Helps restore your hair's natural thickness.