I’m not giving it the full five stars yet, because I’m still figuring it out. I do think it really helps with length. I need more time to test it further. Also, I have oily hair and was afraid things would get worse if I didn’t use a matching shampoo, as I have for so many years. I can tell you that it’s in better condition than before. Objectively, the only downside is the price, but okay.

it's perfect, it was my first expensive shampoo that I bought and after so many dyes and damaged hair I saw amazing results from the first month, my hair grew until it reached my waist after a few months, we're talking about crazy results

It is an amazing shampoo that leaves the hair very soft, with a light and subtle fragrance! Combined with the hair mask, it changed the appearance of my hair from the very first two uses!! Especially the ends, which had been damaged by highlights, became unrecognizable! I didn't notice any greasiness, even though my hair is oily!

Very nice feeling on the hair, indeed, and in combination with oils and general care, my hair grew longer. It makes the hair shiny. The only negative I found is that the hair gets oily very quickly.

Honestly, it is the best hair care line I have ever tried... I have been buying salon products for years, but I haven't found another line like this one... I have fine, dyed blonde hair that breaks very easily and is wild; these products have made it incredibly soft, they don't tangle at all, they smell fantastic, and I hope they will help with growth as well. I wouldn't trade them for anything; anyone who tries them will understand the quality even in the bathroom!

Quite good, it stops hair loss.. but it's definitely good to take vitamins for hair, skin, nails because chemical shampoos work while you use them but then it's the same again..

I bought it for hair that breaks at the ends and doesn't grow long. I have been using it for only 2 weeks, but so far I feel that it dehydrates my hair, doesn't make it shiny, and doesn't make it smooth nicely. However, I must say that when washing, no hair is lost at all, unlike all the other shampoos I have used. I will come back with a newer review when a longer period of time has passed.

I have been using this shampoo for two and a half years and my hair has really grown a lot and is shiny. The combination with the mask, the conditioner, the serum, and the thermique of the same series is the best there is! Its scent is simply amazing! ️

I bought it for my mother who has very damaged hair that hasn't grown for years. The truth is, I didn't expect it to have results due to the low ratings, but I was pleasantly surprised by its effectiveness. My mother's hair looks healthier, shinier, and noticeably longer within a month.

After two consecutive uses, I still don't have an opinion on whether it helps against hair breakage... but for me, it makes the roots of my hair greasy from the next day onwards... while normally they would get greasy on the third day... this doesn't seem very okay to me...

Excellent shampoo. It is the first professional product I have used and I don't change it. I have thin and brittle hair. My hair had no structure and would get oily by the second day. Now they have shape, they are shiny, and I wash them 2-3 times a week. It may be expensive, but this packaging, with the usage I do, lasts for about 4 months. I use the shampoo and the mask of this series. Personally, I haven't noticed a significant increase in length, but definitely the ends don't break as quickly as before using it.

After washing, the hair is shiny, but after two days it becomes very greasy and looks as if it is not clean (at the roots).

It smells wonderful, leaves my hair silky and soft... But only for one day. The next day, it becomes greasy and looks unwashed for a week. Maybe it's not just the shampoo's fault, but also my hair type. Still, for a shampoo that costs a day's wage, I would expect it to do something better than regular supermarket shampoos.

It is good, expensive of course for what it promises, doesn't create much foam, but I think I will go back to my previous shampoo which I consider better.

Awesome product, I saw tremendous improvement in the quality and shine of my hair and they also grew very quickly! I highly recommend it!

The quantity, although 250 ml, is too much. It lasts about 5-6 months, depending on how often it is used (I wash my hair 2-3 times a week). At first, as expected, I didn't see any results. But after 1-2 months of use, I was very satisfied! It does what it promises and my hair is really soft after each wash! It should also be noted that my hair generally doesn't grow easily, so I decided to try this product! After 5 months, it has grown at least 5-6 centimeters. It's unbelievable! I also want to mention that I use the shampoo in combination with the conditioner and mask from the same line. I will try other products from kearastase, but I truly have no words for this specific one!

Initially, although it is only 250ml, the packaging lasts for months. Personally, I have been using it for about 6 months and there is very little left to finish (another wash). It should be noted here that I wash my hair twice a week in winter and now, in summer, three times a week due to heat and sweat. As for how effective the shampoo is, I consider it one of the best and it really does the job (I have fine hair and it is not oily) and in combination with the mask from the same range, you can see a big difference. It leaves the hair soft and I have noticed a difference in length, they have grown by about 4-5 inches. Okay, the price is a bit high, but it is worth investing in as a product.

The hair strengthens and definitely worth its money. Not comparable to commercial shampoos. It works better with a dilution of 1:2. In a clean bottle, mix one part shampoo with two parts water for better application

It has a strange scent which I would be willing to overlook if I was otherwise satisfied. For long thick hair, it requires 3 hands and still doesn't feel like it cleanses properly. I can't evaluate how much it actually helps hair grow longer because I combined it with salon treatments, but I think with its use, my hair broke less. I wouldn't buy it again.

Excellent. Definitely one drawback is the price, but it really does an amazing job. I have thrown away supermarket shampoos and will only use this specific brand.

It is a good shampoo, like all products of this particular company. It indeed helps hair to grow longer, but it does not save already damaged hair. If your ends are damaged, you can only fix them with a haircut, so don't expect miracles. Maybe I would buy it again, but it's not my favorite, of course.

I highly recommend it to everyone. It does exactly what it promises, lengthens hair in a short period of time. I guarantee you, get it and you won't regret it. I have tried countless shampoos of this kind and it is the only one that I had visible results from the first uses.

I didn't love it... it doesn't create enough foam in the hair, it makes it difficult to use, and my hair was always stiff. For me, it didn't work, it was too strong

I do not think it does not foam. When I bought it, I thought it would run out very quickly.. and yet I do not need a lot of quantity for washing even though I have long hair!!! I use it in combination with the mask and serum from the same line, and I am very satisfied! I think I will continue using Kerastase for a long time.

Very good product especially when combined with the mask. It has a slightly peculiar scent which is not to my liking but I overlook it. I buy it constantly.

I expected faster results, but overall it is one of the best shampoos I have tried.

Very good shampoo from the first use and you can see your hair shiny and disciplined. I combined it with the Kerastase Therapiste mask and I saw a huge improvement in my hair. They were seriously dehydrated and didn't grow. I recommend it as a treatment, it doesn't moisturize the hair on its own and it requires a sufficient amount for lather. Pleasant scent and easy to rinse out.