Resistance Hair Serum for Extremely Damaged Hair

Expensive! Worth every penny. It’s a healing serum for my hair that I can use on damp or dry hair. I feel like it can replace my hair oils, leave in conditioners,

I am absolutely in love with this product. As someone who gets their hair lightened at at least 2-3 times a year, and spends the entirety of their summers lifeguarding in intense sun exposure and chlorine, there is often a lot of issues to fix in regards to my hair. So when I tried this product and it smoothed all of my frizz, saved my dry, brittle ends, took my hair from dull to shiny and bouncy, and protected my hair from further breakage, I was completely sold. As I continued to use this product, however, I discovered that its only negative attribute is the quantity inside the bottle. I have read other reviews saying one bottle hardly lasted them a month, but i’ve had this product for TWO WEEKS, using 2 pumps at most after each wash due to the thickness of my hair, and it is already running out! The dual pump is a cool feature, and it definitely works, but it takes away from the practicality of the design and customers getting what they pay for. Absolutely fabulous product, but $50 for only two weeks of perfect hair? You be the judge!

Smells amazing but didn’t notice the product doing anything for my hair. Another downside is that it’s very pricey for such a tiny amount of product.

My hair is bleached every 4-6 weeks and this product leaves my hair ready for blow dry and heat styling. As an actor, my hair goes through rigorous styling damage. After one week of using resistance hair serum my stylist commented that the structure of the hair seemed improved. My hair is no longer straw like it is flexible and shiny.

What a wonderful fragrance! I have all the products from this line. The unique packaging features a transparent and white color. My hair is soft, shiny, and smells lovely. I highly recommend!

I've used this since before it was named Resistance Hair Serum (used to be Fibre Architect), so obviously a long term fan! Not in love with the packaging, sometimes pumps unevenly, but never had a problem replacing it for one that worked, and only had one really problematic bottle over 15 yrs, so really splitting hairs (pun intended) as this product protects root to tip in styling, and I use a flatiron regularly for styling, but I've yet to find any other product that protects and holds its sleek style from EXTREME humidity and heat, even after getting my hair half soaked during a dental procedure, my hair looked as good going into the office as it had when I left, so it has serious staying power. A TINY bit goes a long way and it has a great scent.

From the first day I started using the product I could see the difference in my hair…! I have bleached and dry hair … after applying the serum it’s feel soft and moisture…!!!

I love this product, I have been using it for month and to me is the best for dry blonde hair, my hair now is bright, no damage at all. I recommend 100%. I actually use all kerastase products

This product is fantastic and has made my hair feel amazing. I’ve been using it for a month now, along with the shampoo and conditioner from the same line, and I’ve already noticed a significant difference. Unlike many others who’ve complained about the pump, I haven’t had any issues. Both sides of the product have dispensed smoothly. However, I do find that it goes quite quickly, which is a bit frustrating considering the price. For reference, I wash my hair every other day and use the product after every wash. I’m almost halfway through my bottle. If you can afford to replace it regularly, this product is truly remarkable.

I bought this because my stylist told me it will help with the breakage from bleaching my hair (previous stylist left me under the dryer for too long) and after just a few weeks my stylist has seen significant improvement! I'm not a huge fan of the scents of Kerastase, little too florally for me, but I do like this product.