Genesis Sérum Anti-Chute Fortifiant — Reddit Reviews
by Kérastase
Updated November 5, 2026
Scalp serum for reducing shedding; results split, price stings.
What the community says
A watery, nightly scalp serum built around diaminopyrimidine oxide, caffeine, and piroctone olamine for shedding. It suits people willing to massage one pipette into roots consistently, though high alcohol, persistent fragrance, and irritation turn off many users.
What this means for you
What people love
- Aims to retain existing hair, not promise miracle regrowth
- Some users report noticeably higher density and less shedding
- Feels like nothing in fine hair
Watch out for
Product details
Where to buy
Real Reddit threads — 53 mentions across 22 threads
Kérastase Genesis Sérum Anti-Chute Fortifiant on Reddit, in one place — 22 threads from r/Haircare, r/finehair and 2 more, summarized.
“Kerastase Genesis Serum on my scalp”
Positive
“Both The Ordinary and Kerastase genesis serum helped me to have more density and boy can I tell!”
Positive
“I use just one pipette after every shower, and I still noticed growth over time.”
Positive
“take a look at Kerastase’s Genesis serum! it’s specifically formulated to help prevent hair falling/shedding to help maintain the hair that you already do have :)”
Mentioned
“it irritated my scalp because the alcohol content is quite high”
Cautionary
“Keratase serum not worth it for the price. I haven't notified a change in my hair at all”
Cautionary
“I had nooooo idea Al that in Genesis serum. I bought it and was not impressed.”
Cautionary
“was planning on trying the kerastase genesis serum.. any positive reviews on this?”
Mentioned
“I started using Keratase genesis serum 3 days ago with Redken acidic bonding concentrate 7%”
Positive
“I was using minoxidil for maybe 2 months but I stopped.. thats why I am using Kerastase genesis serum now, it contains Aminexil.”
Positive