KÉRASTASE Genesis Hair Serum — Anti-Breakage Scalp Treatment, 3.04 fl oz, Silicone-Free Light Formula

KÉRASTASE Genesis Hair Serum is a daily, silicone-free scalp serum that anchors strands and reduces hair fall from brushing, clinically shown to cut breakage by 97%.

This lightweight, non-greasy treatment is formulated to strengthen weakened hair from the root using ginger, caffeine and arginine. Designed for targeted application, the serum works on areas with reduced density and can be incorporated into morning or evening routines. It is intended to fortify brittle strands and improve resistance during styling and brushing without leaving residue.

How does the serum reduce hair fall caused by brushing?

The formula focuses on reinforcing fragile fibers at the scalp and along the strand so hair withstands mechanical stress from combing and brushing. Ginger and caffeine work alongside arginine to support scalp microcirculation and resilience, helping strands resist snapping during daily grooming.

• Targets the root to strengthen the base of each hair.
• Species-free silicone formulation keeps hair lightweight and non-greasy.
• Clinically measured to produce up to 97% less hair fall from brushing.

How do I use the product for best results?

Apply the serum directly to a dry or towel-dried scalp section by section, using four doses per application, then massage to distribute. Leave it in — do not rinse — and repeat daily for at least six weeks to observe the full strengthening effect. It fits easily into existing haircare regimes and pairs with other Genesis collection items for enhanced benefits.

• Use once a day, morning or evening, for a minimum six-week course.
• Apply four doses section-by-section on the scalp, then massage gently.
• Compatible with Bain Nutri-Fortifiant, Fondant Renforcateur, and Defense Thermique.

What are the active ingredients and what do they do?

This serum blends ginger and caffeine to help invigorate scalp tone and fortify fragile hair fibers, while arginine supports healthy circulation around hair roots. The composition emphasizes strengthening and anchoring rather than cosmetic coating, making the texture light without residue build-up.

• Ginger: helps condition the scalp and support strand resilience.
• Caffeine: assists in energizing the scalp area for better resistance to breakage.
• Arginine: contributes to blood flow support around hair follicles.

Can it be used on all hair types and with other products?

Genesis Hair Serum is formulated for normal to dry, weakened hair and can be targeted to sparse areas. Because it’s silicone-free and lightweight, it layers well with shampoos, conditioners and thermal protectants from the same collection or your preferred styling products.

• Suitable for normal-to-dry weakened hair needing reinforcement.
• Designed to be used alongside other KÉRASTASE Genesis treatments.
• Light texture allows use before styling or protection steps.

Who is this for: This serum is aimed at people experiencing breakage from brushing or fragile hair that tends to snap when styled. It suits anyone seeking a lightweight, daily scalp treatment to strengthen strands at the root, particularly those already using fortifying shampoos and conditioners and who want a targeted, leave-in solution for areas with reduced density.

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