OLAPLEX's N° 0.5 Scalp Longevity Treatment delivers professional-grade care for your scalp, which ages faster than facial skin and directly impacts hair health. This advanced 50ml serum provides immediate hydration—increasing scalp moisture by 5X—while strengthening the barrier against premature aging. Particularly beneficial for those experiencing hair loss, it creates an optimal environment for healthier, stronger hair growth by addressing the foundation of hair health at the scalp level