• Prevents hair loss: Alpecin double effect shampoo contains high doses of caffeine that penetrate the hair roots during washing. • Effective against dandruff: Alpecin double effect caffeine shampoo loosens embedded epithelial cells and completely removes severe dandruff from the scalp. • Alpecin research: Alpecin is the best-selling hair care brand for preventing hair loss in men in Germany, with scientifically proven effectiveness. • Daily hair routine: Alpecin Anti-Hair Loss Shampoo creates a 24-hour active ingredient deposit at the hair root, protecting the scalp and preventing hereditary hair loss. • How to use: Massage the shampoo into the scalp, leave it on for a moment, and rinse.