KÉRASTASE Genesis Daily Strengthening Hair Serum, 1 fl oz — Silicone-Free, Anti-Breakage

KÉRASTASE Genesis Hair Serum is a lightweight, silicone-free daily treatment formulated with ginger and caffeine to fortify weak hair and reduce breakage from brushing.

This concentrated 1 fl oz serum is designed to reinforce fragile strands and help hair feel healthier and more resilient without weighing it down. The formula combines plant-derived ginger and energizing caffeine with arginine to support scalp circulation and strengthen hair fibers. It’s intended for targeted use on areas that show reduced density and works best as part of the Genesis range for a full-strengthening routine.

How should I apply this serum for best results?

Apply on dry or towel-dried hair, section by section, so the formula reaches the scalp where breakage typically begins. Use the recommended four doses per application and massage gently to encourage absorption; do not rinse out the product afterwards.

• Apply morning or evening for a minimum of six weeks for visible improvement.
• Dispense four doses per treatment; focus on thinner or weakened zones.
• Massage with fingertips to distribute; leave in—no rinsing needed.

What ingredients help reduce breakage and how do they work?

The serum blends ginger and caffeine with arginine to address hair fragility on multiple fronts. Ginger helps to strengthen the strand surface, caffeine provides an energizing effect at the root area, and arginine supports circulation which can help the scalp environment for healthier-looking hair.

• Ginger: reinforces and supports hair fiber resistance.
• Caffeine: stimulates and energizes the scalp area where applied.
• Arginine: helps maintain scalp microcirculation for stronger roots.

Will this serum leave any residue or weigh my hair down?

No—this formulation is intentionally lightweight and silicone-free so it absorbs without leaving a heavy film. Users typically find hair remains soft and natural in texture while feeling sturdier to the touch after consistent use.

• Silicone-free texture avoids buildup and heavy coating.
• Lightweight consistency preserves hair movement and volume.
• Designed for targeted scalp application rather than full-length coating.

How does this fit into a complete hair-strengthening routine?

The Genesis Hair Serum is most effective when paired with complementary products from the same collection, such as a fortifying shampoo, conditioner, and a thermal defense primer. Together they address cleansing, conditioning, and protection to help reduce breakage from brushing and styling across the hair care regimen.

• Use with Bain Nutri-Fortifiant Shampoo to gently cleanse weakened hair.
• Follow with Fondant Renforcateur Conditioner for added nourishment.
• Add Defense Thermique Primer before heat styling for protective benefits.

Who is this for: The KÉRASTASE Genesis Hair Serum is crafted for people with normal to dry, weakened hair that breaks from mechanical stress like brushing. It suits anyone looking for a non-greasy, targeted daily treatment to reinforce strands and improve the appearance of hair density when used consistently as part of a strengthening routine.