KÉRASTASE Genesis Hair Serum — 3.04 fl oz Lightweight Anti-Breakage Treatment with Ginger & Caffeine

KÉRASTASE Genesis Hair Serum is a lightweight, silicone-free daily serum that anchors hair at the scalp to reduce breakage from brushing and fortify weak strands.

This concentrated fortifying treatment combines ginger and caffeine with arginine to help improve hair resistance where it’s most fragile. Designed for normal to dry, weakened hair, the serum is clinically shown to produce up to 97% less hair fall from breakage when used as directed. It’s non-greasy, suitable for daily morning or evening use, and can be applied where density feels reduced to help strengthen hair from the root.

How does this serum reduce hair fall from brushing?

The formula targets the scalp and root area to support hair anchoring and reduce the mechanical stress that causes strands to snap during brushing. Key active ingredients work together to support strand resilience and scalp health without weighing hair down.

• Ginger and caffeine help stimulate the scalp environment for stronger hair support.
• Arginine supports healthy circulation around hair follicles.
• Lightweight silicone-free base prevents residue and buildup.
• Topical application at the root focuses action where breakage begins.

What’s the correct way to use the serum for best results?

Apply the serum to a dry or towel-dried scalp section by section, using four doses per session. Massage gently to spread the product and enhance absorption, then leave it in—do not rinse; repeat morning or evening for a minimum six weeks to assess improvement.

• Use 4 doses per application, sectioning hair for targeted coverage.
• Massage into the scalp to stimulate distribution and uptake.
• Do not rinse—leave the serum in for continuous action.
• Consistent daily use for at least six weeks is recommended.

Will this serum weigh my hair down or leave residue?

No—its lightweight, non-greasy composition is formulated to absorb quickly without creating buildup. The silicone-free texture keeps hair feeling natural while delivering fortifying ingredients where they’re needed most.

• Non-greasy finish suitable for daily routines.
• No silicone means less risk of coating or heaviness on strands.
• Quick absorption helps maintain style and volume.

How does Genesis Hair Serum fit into a full strengthening routine?

This serum complements other products in the KÉRASTASE Genesis line—shampoo, conditioner, and a heat defense primer—for a multi-step approach to reduce breakage and improve hair health. Combining targeted scalp treatment with nourishing cleansers and conditioners enhances overall resilience of weakened hair.

• Pair with Bain Nutri-Fortifiant (shampoo) for cleansing and nutrient support.
• Use Fondant Renforcateur (conditioner) to soften and strengthen strands.
• Add Defense Thermique Primer before heat styling for protection.

Who is this for? KÉRASTASE Genesis Hair Serum is ideal for anyone with normal to dry hair that shows signs of weakening or increased breakage from brushing. It’s suited to people who want a targeted, leave-in scalp treatment that’s lightweight and easy to add to daily routines—especially those seeking to strengthen fragile hair at the root and reduce visible hair fall from mechanical stress.

Ingredients

AQUA / WATER / EAU • ALCOHOL DENAT. • ARGININE • PEG-40 HYDROGENATED CASTOR OIL • CITRIC ACID • NIACINAMIDE • CALCIUM PANTOTHENATE • CAFFEINE • LIMONENE • PYRIDOXINE HCl • LINALOOL • POLYQUATERNIUM-11 • SAFFLOWER GLUCOSIDE • BENZYL SALICYLATE • COUMARIN • CITRAL • BENZYL ALCOHOL • XYLITYLGLUCOSIDE • CITRONELLOL • BENZYL BENZOATE • ANHYDROXYLITOL • XYLITOL • ZINGIBER OFFICINALE ROOT EXTRACT / GINGER ROOT EXTRACT • RESVERATROL • TOCOPHEROL • SODIUM CITRATE • PARFUM / FRAGRANCE