I've been using the Plantur 21 shampoo and conditioner for about 4 months now and I'm very excited. I've been trying to grow my hair for years, but because my hair growth is very slow and I'm very impatient I was looking for a shampoo to stimulate my hair growth. I found that with Plantur21! And I'm totally thrilled! Some people in my circle of acquaintances also addressed me that my hair has grown a lot longer. The caffeine contained in the shampoo stimulates hair growth. Simply massage into damp hair, leave for about 2 minutes and rinse out. I still use the right conditioner afterwards and my hair gets really soft, combs well and grows a little faster, I feel like it. You should use the shampoo every day so that caffeine is supplied with the scalp every day. On days where you don't want to wash your hair, there is Plantur 21 boosters, a scalp serum with nutri caffeine complex. I can only say: megatolle products! I love them!