Formation of free radicals in human skin during irradiation with infrared light.

摘要

TO THE EDITOR:Constant exposure to solar UV irradiation and environmental hazards produces free radicals in the skin (Darr and Fridovich, 1994; Zastrow et al., 2004). The human organism has developed a protection system against the destructive action of free radicals, consisting mostly of vitamins, carotenoids, and enzymes (Stahl and Sies, 2003; Sander et al., 2004; Darvin et al., 2006). Approximately 70% of carotenoids in human skin are (3-carotene and lyco-pene (Hata et al, 2000), which can serve as markers for the whole antiox-idative potential (Darvin et al., 2008).