Kerastase Review
A premium salon-brand shampoo line marketed for thinning hair — is it worth the price difference over drugstore options?
What is Kerastase?
Kerastase is a premium hair care brand under L’Oreal, with a dedicated line (Genesis) marketed toward hair thinning and weakened hair. It’s sold primarily through salons and positioned as a luxury alternative to drugstore hair care rather than a medical hair loss treatment.
Like other cosmetic shampoo lines, Kerastase doesn’t contain finasteride or minoxidil. For an actual regrowth treatment, see our OTC hair loss treatment guide covering the ingredients with real clinical backing.
Pros and cons
What works
- High-quality formulation for hair and scalp feel
- Widely available through salons and retailers
- Pleasant sensory experience, salon-quality results
- Safe to use alongside any hair loss treatment
Where it falls short
- No active drug ingredient for hair loss
- Premium pricing significantly above drugstore alternatives
- Won’t meaningfully regrow hair on its own
- Marketed toward hair quality, not medical hair loss
How it compares to real treatment
Kerastase is best understood as premium hair care, not a hair loss treatment — similar in role to Nioxin, but at a higher price point with a salon-brand positioning. If you’re dealing with actual thinning or hair loss rather than hair quality concerns, our women’s hair loss treatment guide covers options that address the cause directly.
Want a treatment that targets hair loss directly?
See options with real clinical evidence behind them, not just cosmetic support.
Compare Treatment OptionsCommon questions
Does Kerastase help with hair loss?
Kerastase’s Genesis line can improve hair strength and reduce breakage, but it doesn’t contain an active ingredient proven to regrow hair or stop hormonal hair loss.
Is Kerastase worth the price?
For overall hair and scalp quality, many users find it worthwhile. As a hair loss treatment specifically, the price isn’t justified by added regrowth benefit over cheaper options.
Can I use Kerastase with minoxidil or finasteride?
Yes, Kerastase is a cosmetic hair care product, not a drug treatment, so it’s safe to use alongside prescription or OTC hair loss medications.
Where can I buy Kerastase?
Kerastase is primarily sold through professional salons, though select products are available through authorized retailers.