Having tried this as well as Ducray Argeal (the previous formula of the same shampoo), I vote for Argeal by far. While Sab may leave a nice result on the first day, unfortunately the next day the hair gets greasy. It leaves a heavy and oily feeling, and the situation cannot be saved even with styling products. It may make a small difference over time when used consistently in combination with other shampoos, but generally it did not help me. The company's old product was indeed very effective and I am sorry that I can no longer find it.

Very good shampoo that my doctor recommended to me. She told me to use it every third wash because it is heavy. And I saw a difference over time. (Leave it on the head for 3-4 minutes)

Last update: I changed shampoo and started using a supermarket brand (non-pharmaceutical) that is simply for oily hair. I saw better results. I can now confidently say that this specific product is not worth even half a euro.
1.5 months later: no improvement in oiliness, no difference compared to regular shampoo, wasted money!!
The dermatologist told me to buy it to regulate the oiliness on my scalp and to wash my hair less frequently. So far, after three uses, I can say that my hair gets oily a little earlier than before!

It has a subtle scent and cleans deeply, leaving the hair lightweight and easy to comb. Unfortunately, it doesn't deliver on its promises as the hair becomes oily after a few hours.