Kérastase Genesis Hair Serum is a daily, silicone-free treatment designed for weak, brittle, or damaged hair. Enriched with caffeine and ginger root extract, this lightweight serum fortifies and strengthens strands while reducing breakage from brushing. Clinically proven—97% of users experienced less hair fall due to breakage after consistent use. The nourishing formula absorbs quickly without leaving residue, promoting healthier, fuller-looking hair. Perfect for dry or weakened hair, this scalp-targeted serum boosts resilience and supports long-term hair strength. For best results, apply 4 doses morning or evening on dry or towel-dried scalp, massage gently, and use continuously for at least 6 weeks. Do not rinse. Transform fragile hair into stronger, more nourished locks with this professional-grade treatment trusted by salons worldwide.