It is very heavy as a formula, I don't know if it's the keratin because I've used shampoos with a "pearly" appearance before without keratin and they were like that too. The good thing is that you need a very small amount, the bad thing is that you don't get the feeling that your hair is clean, at least compared to the pharmaceutical vitamin shampoo I used before for hair loss. And it makes so much and such thick foam that it seems suspicious to me for a sulfate-free shampoo. I got the small package to try it and the truth is it didn't last long enough for me to judge if it's good for the hair, but I don't think I will buy it again.

Very good lightweight shampoo. It doesn't weigh down the hair, keeps its fragrance, and even though it doesn't have SLES it lathers quite well.
I definitely recommend it for sensitive scalp and hair prone to oiliness since it doesn't weigh them down.

It creates a lot of foam, has a nice scent, and requires a relatively small amount. If you combine it with the same mask, it is perfect

Good shampoo for hair that has undergone keratin treatment. Compared to other sulfate-free products I have tried, this one lathers quite a bit. I have purchased it two times in a row.

The scent is excellent and I have seen a very big difference in the quality of the hair. The bottle also lasts for a very long time.

Amazing product, I got it after keratin treatment and it maintained the result even beyond three months. Despite being sulfate-free, it lathers very well.

Fantastic shampoo and it foams with a small amount. It smells very discreetly and it has helped me a lot with skin irritation.

Edit: The shampoo lasts forever. I wash my hair almost every day and since I got it in the summer, it still hasn't finished!