Editor's TipEditor's Tip

For added protection, use together with Kérastase Chroma Thermique.

Kérastase

Birchbox Breakdown

Apologies to Gehry, Libeskind, and all the other starchitects: Kerastase is giving you a run for your money—at least when it comes to jawdropping hair feats. The brand’s dual-phase serum transforms damaged hair by repairing its actual foundations—the fibers in each individual strand. Once those are fortified and healthy, the serum adds ceramides for smoothness and gloss. You’ll have a gorgeous, award-worthy coif.

How it Works

Instead of just piling shine enhancers on top of deteriorated strands, Kerastase’s two-part serum gets to the root of the problem—literally. Intra-Cylane and Pro-Keratin work together to reinforce and fill in damaged hair fibers. Then, ceramide seal the newly healthy strands and give them a sleek, uniform exterior.

How to Use

Squeeze a dime- to nickel-sized amount (depending on hair length) into palms and rub together. Run hands through damp or dry hair from mid-length to tip. Blow dry or flat iron to seal each cuticle.

More for You!
  • Product orders $50+ and all monthly box brands ship free
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

4.4 out of 5 stars, based on 5 reviews 5 Reviews
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Most Helpful Customer Reviews

Not totally sure it worked, but really liked it

I have long, bleached hair, so it wasn't in the best place to begin with. I used this stuff completely in about 6 weeks. My hair seemed manageable and definitely shinier after I was through, but I can't tell that it "repaired" anything, as I also had my hair trimmed twice during this period, and was using other hair care products. I'm not sure it's worth the price, but if it were cheaper, I'd probably keep it in my rotation.

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Love this!

This product has transformed my dead ends! Every time I use it it looks like I just got a fresh cut!

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I'm on the fence

I'm still using this and I can't tell if my ends are improving because of regular deep conditioning. So far so good, and the smell isn't over powering.

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Tames flyaways and makes hair silky

I have long, bleached hair. I add this product midway through a blowdry - to the ends only. I think it really tames the flyaways and makes my ends look healthy.

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You're going to get addicted

I love this stuff I am from the city in TX and with all the damage in the summer from the pool and sun my hair needs this. I have long hair so split ends have always been an issue, but with this stuff my hair has never looked healthier. I have always been a big fan of Kérastase products but this one is one of the BEST!

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