Key ingredients
4.3/5
Genesis daily hair serum. A leave-on for weak, shedding-prone hair, not a shampoo.
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Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair
$33.00
Fortifiant Hair Serum: A daily strengthening serum designed to prevent hair fall due to breakage from brushing. Enriched with ginger and caffeine treatment improves resistance in weak brittle hair
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The Edyt Score
4.4 / 5.0
Targets
4.4/5
For breakage and a thinning look. Skip it if you only need a purple wash.
Formula standards
4.4/5
A serum. On the scalp or lengths as labeled. It can feel wet. Give it weeks.
The verdict
A reasonable daily serum. It will not replace a clinician if hair is shedding fast.
Compare against similar products
Side-by-side vs 2 near substitutes (Kérastase) — best for, key actives, type, Edyt score, and notes. Swipe sideways to compare.
| Pick | |||
|---|---|---|---|
| Best for | Genesis strengthening serum | Product | Product |
| Key actives | — | — | — |
| Type | Serum | Other | Other |
| Edyt score Methodology: The Edyt Score reflects ingredient profiles, concentration, and formulation standards. It is separate from crowd-sourced user reviews. | 4.4 · genesis hair serum | 4.4 · product | 4.4 · product |
| Notes | Serum | Other | Other |
| $ / size | $33.00 | $46 | $46 |
| Shop | Buy on AmazonThis page | Buy on AmazonProduct page | Buy on AmazonProduct page |
FAQ
Who is Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair best for?
Fortifiant Hair Serum: A daily strengthening serum designed to prevent hair fall due to breakage from brushing. Enriched with ginger and caffeine treatment improves resistance in weak brittle hair
How did Edyt score this serum?
Edyt rates Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair 4.4 out of 5 based on formula fit for at-home nail looks — who it is built for and how it performs in paint or press kits — not star averages or paid placement.
How does it compare to similar products?
The compare table above stacks Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair against near substitutes for the same shopping job, including picks from Kérastase. For more from the same brand, see More from Kérastase below.
Where can I buy it?
Shop Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair with the Buy on Amazon button when it is available. We may earn a commission from qualifying purchases. Prices and availability can change.