One Drop Keratin Smooth Hair Serum 60ml combines keratin protein with nourishing oils to transform frizzy, damaged hair into silky, manageable strands. This concentrated formula penetrates the hair shaft, repairing breakage and restoring natural shine while providing heat protection up to 230°C. Ideal for all hair types, especially curly and coarse textures, it tames flyaways and enhances smoothness without weighing hair down. Apply to damp or dry hair for professional salon-quality results that last through multiple washes, delivering visibly healthier, more lustrous locks.