Serum for immediate relief from irritation and long-term scalp balance | Sensitive scalps need care that not only soothes but also strengthens them. The serum Olaplex N°0.5 Scalp Longevity Treatment immediately relieves irritation, restores the protective barrier and supports the balance naturale of the microbiome. Its light texture is quickly absorbed, leaves no residue and provides long-term protection from external agents. With regular use, the scalp will be healthy, more resistant and pronto to grow strong hair.