Keratinised 6 July 2020 The process where skin cells lose their cellular contents which is replaced by keratin. The keratinised cells become the layer of skin that is sloughed of by desquamation or the hard, bonded layers that form the nail plate. Related Articles: pH in Nail Care Explained: A Guide for Nail ProfessionalsCuticle Oils: Why ‘Dead’ Nails Still Desperately Need Them!What Is the Cuticle and Why It Matters for Nail HealthGlossary: CuticleGlossary: Nail plate