Alpecin Trio Pack: Caffeine Shampoo C1 stimulates hair growth directly at the roots. Alpecin provides the hair roots with active caffeine and ensures vigorous, healthy hair growth. This creates better hair grip for thin, weak hair. Alpecin Double Effect Shampoo helps fight against dandruff and hereditary hair loss. By thoroughly cleansing away all dandruff from the scalp in the first instance, the caffeine complex is able to deeply penetrate into the hair root and strengthen it against hereditary hair loss. Alpecin Liquid Hair Energizer combines caffeine-based ingredients and keeps the hair roots active and helps extend their growth phase longer than genetically predisposed.