Alpecin's C1 Caffeine Shampoo revitalizes your hair and cleanses the scalp to encourage the growth of natural hair. Your hair feels fuller and more energized thanks to alpecin. German engineering for your hair: The German caffeine shampoo for men is called Alpecin C1. Alpecin C1 is a carefully formulated product that helps restore the quality, strength, and thickness of hair while leaving it clean. ENCOURAGE HAIR GROWTH: Weak or thinning hair can result from certain activities and supplements. In order to help promote thicker, fuller-feeling hair, alpecin caffeine shampoo was created to boost and restore energy to weaker hair. DOPING FOR YOUR HAIR: Use a shampoo that contains caffeine to invigorate your hair and scalp. Caffeine stimulates your scalp and makes your hair feel stronger. Use Alpecin hair care products to improve the strength and quality of your hair.