A godsend on my damaged fine hair, it cleanses without stripping, it lathers beautifully, its color-safe, honestly this is the best shampoo I've tried in a long time. As someone who has spent way too much money on every single fine-hair recommended shampoo in existence, this is an absolute winner. I will definitely be repurchasing, please never change this formula!!

Truly incredible! I don't know if it's this shampoo alone as I combine with the co-ordinating mask, and then the serum but within 2 weeks my overly processed and damaged hair finally started to feel less straw like and actually felt soft when I woke up the next morning. I'm experiencing less breakage and the overall texture of my hair has improved. The scent is gorgeous but intense so not for everyone. Fortunately for me, I love it! The level 3/4 of the Resistance lineup has saved my highlighted peri-menopause hair. I anticipate this trio taking around 3 months to finish and then I'll move to the level 1/2. Kerastase is amazing but you need to be using the right product. Despite my hair stylist telling me my hair was "moderately dry", moisture alone wasn't what my hair needed. I'm thrilled to have found this line.

Have been using this after major bleach damage for years…now no shampoo compares and is an everyday staple! Nothing makes my hair feel as clean without drying it out. I have thin wavy hair for reference

This shampoo is top quality. The lather, the smell, the bottle, it's all so luxurious. A little goes a long way. I personally use three pea sizes and lather it into my scalp then rinse and repeat. I feel like I'm at the spa when using this shampoo. The price is high, but the amount of product I use makes it worthwhile—with cheaper shampoos I use a lot more product.

I have thick, wavy, very dry hair and this is my go-to must have! I’ve rebought at least a handful of times already. I only wish they sold this in a liter size.

I’ve owned almost every Kérastase shampoo but this one is definitely one of my favorites! I have fine highlighted hair. I am obsessed with the smell and it always makes my hair feel amazing. I don’t think it adds too much protein either. Will always be a staple in my routine

I have waist-length red hair that I have been box-dying for 10 years now. On top of that my hair is 2A and has a bit of texture to it. It’s thick. This line of products has been transformative. It took several uses but I am seeing great results. My hair is softer and more manageable. It feels hydrated. This shampoo doesn’t strip my hair and I love that. I have less hair breakage and loss. I need about a looney-sized (that’s a dollar coin for all you non-Canadians) sized amount to wash all my hair.

My all time favorite. Smells like you just left the salon and has an amazing lather! It leaves your hair soft and shiny as well.

I purchased this as I wanted to try something new from kerastase. It was a nice shampoo. But didn’t do anything different from the other shampoos they have.

This shampoo is a life saver and the whole line has changed my life. I recommend this to anyone with EXTREMELY damaged hair. This is not for lightly damaged hair. You will excperience weigh down and all the moisture will probably change your hair texture. My hair is naturally curly and was damaged from bleaching from black box dye to bright blonde, then dyed back brown twice bc the first time the stylist made my hair a horrible burgendy color not chocolate brown like i asked...thr blonde process took over a year. Then add all the heat damage. My hair is breaking off and i want to try to salvage my length. First let me say...if you have curly hair...do not go blonde. It will kill your curls and you will have to constantly straighten your hair ending up with crunch fried lengths...not even split ends. I love Kerastate and decided to try the extremely damaged hair line. My hair is so damaged that protien treatments wont work...its past that point. So i did not excpect it to work so quickly. Ive used it twice and my hair is already soooo much more manageable and soft. I use the shampoo and leave it on my hair for 2 mintues, then use the mask. I love the mask but it doesnt act like a conditioner on my hair so i wash the mask out after 15 mintues then use Oribe hair alchemy conditioner, leave it on for 2 mintues and rinse...but if they had a conditioner with this line i would use it. After that i spray my hair with Matrix protien builder, then use the kerastase extreme length and damage serum( smells sooo good and works even better). After, i apply the kerastase damage repair heat protection cream and oribe blow out cream, blow dry on low heat at the roots til 80% dry...then use my revlon blow out brush on LOW...its waaaaay to hot to use on high. It will fry your hair. I probably caused alot of thr damage with that tool using it on wet hair and on hot. Make sure yoir hair is 80% dry. On dry hair i will also apply the serum before bed and wear a bonnet