No. 0.5

Your scalp ages six times faster than your face. It's time to treat it that way. Meet the Nº.0.5 Scalp Longevity Treatment. OLAPLEX's first-ever bond-building scalp serum, clinically proven to fight accelerated scalp aging and create the foundation your hair needs to thrive. This weightless, leave-in serum works on a molecular level, immediately hydrating and soothing the scalp while delivering long-term anti-aging protection against the daily stressors that break down scalp health over time: UV exposure, hard water, chemical treatments, heat styling, stress, and environmental pollution. The skin on the scalp has a naturally lower barrier function and slower cell turnover than the skin on the face and body, making it more susceptible to accelerated aging. The Nº.0.5 targets this directly with a three-pronged complex: patented OLAPLEX Bond Building Technology, an antioxidant-rich botanical blend, and a microbiome-balancing formula. The ultra-lightweight texture absorbs instantly with zero residue, making it compatible with all hair types, textures, and styling routines. Trichologist approved, dermatologist tested, and free of parabens, phthalates, and sulfates. Vegan and cruelty-free.