This shampoo with a special formula contains Caffeine and no softener (e.g. silicone). It should be used once each day as a wash and then left in contact with the hair and scalp for minimum of 2 minutes. During the wash, Caffeine from Alpecin C1 is transferred to the scalp and it strengthens the hair follicles. The special formula, which avoids softeners, also improves the structure of the hair and results in better hair grip for better styling. After just a few washes benefits are noticed and fine and weakened hair are rescued.

This is another German engineering for you.