8H Magic Night Serum

An overnight leave-in serum that intensely nourishes dry hair over 8 hours for softer and easier hair to style the next morning.

8H Magic Night Serum is rated 4.0 out of 5 by 10.
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How To Use

Use 2 to 4 pumps, depending on the length and thickness of the hair. Apply on lengths and ends. For application on wet hair, towel-dry hair before applying. Style hair as desired overnight. Leave in. No rinse necessary. Reapply as needed on dry hair for an added boost of overnight nutrition.

This overnight leave-in serum gives a nourishing boost to all dry hair types. During the night, hair is prone to reverse the daytime loss by absorbing all of nutrients of you hair care. Infused with Iris Root extract and a blend of 5 vitamins including vitamin E, the serum deeply penetrates the fiber over 8 hours for 100% absorption to restore hair's balanced nutrition levels. Its lightweight creamy texture suits all hair types: on fine hair it helps detangling and provides a better manageability on normal to coarse hair. Applied at night, hair progressively absorbs the nutrients of the nourishing serum to reverse daytime depletion. This milky-gel like cream melts into the hair to be quickly absorbed. The next morning, hair looks nourished and is visibly softer, easier to style, with a lightweight satin finish.

  • 8H of overnight nourishment, in combination with Bain Satin 2 + Masquintense.
  • Provides easier detangling, avoiding pillow friction.
  • Hair fiber is softer to the touch.
  • Evolving fragrance to promote relaxed sleep and energy in the morning.
  • Increases manageability on normal to coarse hair.
  • Hydrates without weighting down on fine hair .
  • Provides definition to curly hair .

For the first time, sleep your way to beautiful hair.
- Iris Root extract: nourishes progressively & durably over 8h (reverses daytime loss of nutrients & creates a beauty coat on fiber)
- 5 vitamins blend : seals cuticles with a satin finish (progressive nutrient penetration & durable anchroring )


Rated 5 out of 5 by from Grown to love I have to admit, I wanted to love this serum right off the bat and didn’t. But after consistent continued use, I’ve grown to absolutely adore this nighttime ritual. The smell truly does help me sleep, and my husband too by the way! And I wake up to nourished hair! Definitely recommend. But if you’re like me and don’t automatically love it... stick with it for a few weeks and the results will shock you!
Date published: 2021-04-18
Rated 2 out of 5 by from Increase in hair loss :( This product made my hair feel soo smooth but I instantly noticed an increase in hair loss in the shower within a week... My hair was coming out in chunks and I don't even put the product near my scalp. I wasn't positive the hair loss was from the product so I stopped using it to see what would happen. Within another week my hair fallout decreased drastically! Unfortunately this product didn't work for me :(
Date published: 2021-04-04
Rated 5 out of 5 by from Miracle in a Bottle! I have awful hair: dry, brittle, damaged, you name it. I’ve always had bad hair, but now that I’m in my 50s with grey coloured hair, it’s worse. Nevertheless, my hair is wavy and when I was younger I found my waves looked better when my hair was longer. My hair hasn’t been long in years, however, because because every time I go to a hairdresser they take one look at my crappy hair and chop it all off. When my hairdresser closed during the pandemic, however, I decided to see if I could grow my hair past chin length. Believe or not, my hair is now past shoulder length. As the cold, dry weather moved in, however, my hair become ominously brittle (see: about to snap off). In desperation, I googled and read great reviews about this product. I was sceptical because A) I’ve tried everything. I mean, literally, everything. B) I have really crappy hair. See above. From the first time I tried this product, it was transformative. Not exaggerating! It instantly made my hair softer and smoother and I woke up to...more normal hair! Ever since I have been putting it on most nights. It does coat your hair a bit (I have a fair amount of hair but it’s fine) so I don’t use it the first night after I wash my hair.Then again, it says to use one pump or two but I tend to slather it on because my hair just soaks it up. It DEFINITELY has improved my hair! Truly, the difference is night and day. Over the past few weeks I’ve been noticing my hair is getting softer and softer, and feeling less brittle and coarse. The real proof is that I just coloured my hair tonight. Normally after a colour my hair feels coarse and crispy. This time my hair feels soft and smooth after colouring, and even - dare I say - silky. I am painfully aware that this is a pricey product but, trust me, it’s worth every drop. And its smell? Heavenly. If “posh” had a smell, this would be it. By the way, I combine this with the new Chronologiste line, which is also transformative. Buy it all! Yes, I know you’ll have sticker shock when you see the total in your shopping cart. But once you get them at home and try them, I’m confident you’ll thank me!
Date published: 2021-01-16
Rated 1 out of 5 by from To greasy.I washed every day my hair because of th I am not satisfied, I trust your information therefore I bought but I waist my money I need some different product help my tiny hair no grease them
Date published: 2021-01-02
Rated 2 out of 5 by from Not what I was expecting I absolutely love Kerastase products but unfortunately not happy with this serum. Smell amazing but really I didn’t see any changes on my hair after many nights of using. It was good to try but I am not buying this product again.
Date published: 2020-12-27
Rated 5 out of 5 by from Great product Awesome product, less split ends, I’ve been using it for a month now. Overall my hair is softer and it smells so so good!! A bit expensive but I don’t use much for my long hair so it will last!
Date published: 2020-04-30
Rated 5 out of 5 by from Does what it promises I bought a little more than a month ago and I dont have split ends anymore
Date published: 2020-04-12
Rated 5 out of 5 by from Will Never Run Out of This!! Already a big fan of their masques, I was ecstatic when they formulated this serum, especially because I go to bed with wet hair and style in the AM. I use four pumps, as I have fairly thick, long hair; but I still see this bottle lasting for a long time. It has worked wonders for styling and making my dry ends look fresh. The smell is absolutely stunning. It does exactly what it claims it will do. Super happy!
Date published: 2020-01-21
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