a close-up of the parting of brown and gray hair, with an acid peel or serum dripping from the pipette.

adult anxiety appearance beginnings biology blond brown cells cheek closeup colors combines concepts dermatology detailed discovery diseases dripping dropper elegance examining exfoliation eyebrow fiber fight finger gray growth hairstyle health healthy human hygiene improving lifestyle lifestyles liquid longhair magnification maintaining medicine merchandise microscope oiliness organ parting person pipette prevention protein scalp science serum silver smooth sparse strands studio texture uncomfortable wellbeing woman young youthful