Nanotechnology is a rapidly developing branch of science, which studies control of phenomena and materials sized below 100 nm. Nanotechnology is applicable in many areas of life and medicine including skin care and personal hygiene. The nanoparticles (NPs) of metals and metal oxides are increasingly used in dermatology and cosmetology, especially in prevention and treatment of bacterial and fungal infections, in protection against the harmful effects of the sun and in preparations reducing the visibility of scars by accelerating the repair processes of skin cells. NPs may also be used for skin care and dermatological treatments to improve the quality of life of patients. Nanodermatology and nanocosmetology offer effective, safe, fast-acting product formulations, thus minimizing the side effects of the products used so far. The unique properties of NPs: high surface area relative to the size as well as the ability to penetrate biological membranes and barriers greatly reduces systemic dose thus potential side effects and toxicity. Recent studies show very promising clinical potential of NPs to serve as controlled release and delivery systems for drugs/active substances. In addition, NPs can be used in diagnostic imaging of skin diseases. However, NPs may also carry a risk of cytotoxicity and side effects. The present review focuses on the use of metal and metal oxide NPs in dermatology and cosmetology and their interactions with skin cells.
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