Kérastase Genesis Serum Review: Help for Hair Fall From Breakage?

1/16/20262 min read

If your hair has been feeling weak lately — more strands on your brush, more breakage, and less thickness — you’re not alone. Many times, what we call “hair fall” is actually hair fall from breakage (hair snapping, not necessarily falling from the root).

Kérastase Genesis Serum is a leave-in scalp serum made to support the scalp and help reduce hair fall caused by breakage. It’s a popular choice for people who want a simple step in their routine to make hair feel stronger over time.

What this serum is for (and what it’s not)

This serum can be a good match if you:

  • notice more breakage when brushing or styling

  • feel your hair is fragile or “tired”

  • use heat tools often or have colored hair

  • want a scalp product that you don’t rinse out

  • want a consistent routine that supports stronger-looking hair

It’s not a medical treatment for serious hair loss. If you have sudden heavy shedding or visible thinning from the roots, it’s always a good idea to check your health factors (stress, iron, hormones, thyroid) with a professional.

How to use Kérastase Genesis Serum

This is the simplest way:

  1. Apply a small amount to the scalp/roots (use the dropper)

  2. Massage gently for 1–2 minutes

  3. Leave it in — no rinse

You can use it daily, or at least after wash days. Like most hair products, results depend on consistency.

What you can realistically expect

This is not an “overnight” product. But with regular use, people usually look for:

  • less breakage during brushing

  • hair that feels stronger and more resistant

  • a scalp routine that feels more supportive

A good time to judge it is 3–6 weeks, not a few days.

Tips to get better results (these help a lot)

A serum works best when the rest of your routine supports it:

  • Brush gently, especially when hair is wet

  • Use heat protection and lower heat when possible

  • Avoid very tight ponytails and buns every day

  • Use a nourishing mask or conditioner on the lengths

  • Consider a silk/satin pillowcase to reduce friction

Small changes like these can make a big difference in breakage.

My final thoughts

If your main issue is weak hair and breakage, Kérastase Genesis Serum is a nice option to try as a daily scalp step. It’s simple to use, feels high-quality, and fits into most routines. Just keep your expectations realistic and give it time — consistent use matters.

Where to buy

Check price” or “Shop Kérastase Genesis Serum

Disclosure: This post may contain affiliate links, which means I may earn a small commission if you purchase through my link, at no extra cost to you.