Emulsions Systems for Skin Care: From Macro to Nano-Formulations

Abstract

Aging of the skin, the largest human body´s organ, is a gradual process that involves both intrinsic molecules (e.g. reactive oxygen species (ROS) [1] and environmental factors (e.g. ultraviolet radiation [2,3]. During this process, the skin appearance and functions are altered (e.g. stimulated release of collagenase, elastase and hyaluronidase from the extracellular matrix (ECM)) [1]. The signs of skin aging are visible in the form of wrinkles, uneven pigment appearance and skin atrophy [2]. An aged skin will decrease the social comfort and self-confidence [4].