Nanotechnology Roles in Cosmetics

Nanotechnology is a technique that can improve the performance in the pharmaceutical, dermatology, and cosmetics fields. Nanoparticles range from 1 to 100 nm. Due to their small size, they exhibit remarkable physical and chemical properties that compose more stable and effective technology for delivery systems in the cosmetics field. One of the delivery systems used in cosmetics is nanoemulsion, which is a practical and non-invasive treatment for skin problems. This chapter summarizes the nanoemulsion formulation's enhanced performance and efficacy in applying moisturizer, anti-aging, antioxidant, and anti-acne. The tiny droplets in the respective cosmetic formulation exhibit uniform spread on the skin and permeability within the skin layers, thus enhancing the penetration through the skin, increasing the amount of the active agent absorbed, and improving the formulation's effectiveness. The safety assessment of nanoemulsion as topical preparation nanocosmetic is also reviewed. There is no obvious evidence that the application of nanocosmetics can penetrate deeper skin layers and be carried away in the bloodstream to harm human health. Accordingly, nanocosmetic topical preparation in nanoemulsion form is considerably safe for human application.