Atopic dermatitis (AD) is characterized by skin barrier dysfunction. Notably, a high number of nano-scale protrusions on the surface of corneocytes, which can be expressed by the Dermal Texture Index (DTI), was recently associated with pediatric AD, loss-of-function mutations in filaggrin gene (FLG), and reduced levels of natural moisturizing factors (NMF). No study has so far examined the association between these parameters and monomeric filaggrin levels in adults.