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Ever since we watched the first season of “Gossip Girl,” we’ve been huge fans of Blake Lively’s flowing waves. So we were excited to learn that the blonde actress was the inspiration behind Kérastase’s new serum. Specially designed for long hair, the leave-in treatment adds a high-definition shine while sealing each cuticle (bye bye, split ends). Plus, the light, gorgeously scented formula won’t weigh down your strands.
I have very fine, straight hair, and so this product wasn't quite lightweight enough to make my hair look shiny and frizz-free, instead making it look just kind of oily.4
This was definitely a smoothing product that added a bit of shine. Also did a nice job of hiding split ends!4
I keep my hair very short so it is cut quite often. Because of this, I really don't have a need for a hair serum. I do color my hair, but it is very healthy. My hair is also fine, so a product like this would most likely weigh it down.3
I liked the way my hair looked after using the product. It is pretry pricey so I won't buy it right away.5
Pretty impressed with this product. I usually use oils because serums are a bit too greasy, but this one wasn't bad.5
I have fine, long hair. I don't have a major problem with frizz, but love adding volume and shine to my hair (in general, I have better luck with two separate products for that). This was great at getting rid of frizz and leaving my hair very soft. It was good at adding shine, but I have other products that are better. It didn't leave my hair flat, but I'm not sure that it's my favorite defrizzer4
I have very curly hair, which I straighten - and this serum did a wonderful job smoothing frizz. It was a little denser than serums I prefer to use, but the finished product was fantastic!4
As a lot of other people have commented, this product seemed a little bit heavy. I am familiar with the brand and LOVE what I have had from them before, but this was not my favorite. Maybe the sample size made it hard to use the right amount? Still love Kérastase.3
I added shine and smoothed my ends. wish the sample would have been bigger.4
The scent isn't overpowering, and it's moisturizing without being too greasy.5