Alpecin Shampoo 250 ml contains is a Hair Energizer shampoo that contains caffeine complex to strengthen the hair roots and prevent hair loss. The caffeine-containing active ingredient combination keeps hair roots awake and contributes to extending their growth phases. When applied, it causes a fresh tingling on the scalp, its active ingredients travel along the hair shaft and form a depot sufficient for up to 24 hours. Caffeine activates the hair roots, prolongs the growth phase and improves hair growth. Alpecin Caffeine penetrates the scalp even when the shampoo has been rinsed out. In just 120 seconds the active ingredient travels along the hair shaft directly to your hair follicles. Based on the intentional omission of softeners (e.g. silicone), the hair structure improves after just a few hair washes with enhanced hair grip. Fine and weakened hair becomes stronger and can be styled better.