Olaplex No. 0.5 Scalp TreatmentThe scalp ages faster than all other skin and can directly affect hair health. This weightless leave in scalp treatment immediately hydrates and soothes the scalp, protecting against accelerated scalp aging to promote smooth, shiny, healthy hair. For all scalp and hair types. Dermatologist tested & trichologist approved. How To Use Part hair with needlenose applicator. Squeeze gently and apply directly to scalp. Continue for as many sections as