To stimulate hair growth directly at the hair roots.
Caffeine promotes hair growth and has been proven in numerous Alpecin studies to slow down hereditary hair loss. The active ingredient combination goes directly to the hair roots during daily hair washing. Within just 120 seconds, the caffeine travels along the hair shaft directly into the hair follicles. If the shampoo is left on the scalp for longer, the caffeine will also penetrate into the skin around the hair roots.
