This shampoo cleanses the hair very gently. It moisturises and soothes the scalp. The "fuel" in the form of caffeine can still penetrate the scalp. Here it stimulates the hair roots and prevents hair loss.Information for competitive athletes: Alpecin Caffeine can be detected in hair follicles.Alpecin's product range has been specifically developed to strengthen hair. With its unique galenic formula and its optimal caffeine dosage it helps to counteract the negative effect of testosterone and supports strong hair. The Alpecin Caffeine Complex contains caffeine, zinc and niacinamide for healthy hair roots.For sensitive or itchy scalps, With patented skin activator, Moisture fuel, Stimulates hair roots, Gentle on the scalp