Topically applied extracts from green tea appear to reduce the number of sunburn cells and protect skin cells from damage caused by ultraviolet (UV) radiation, according to researchers from the University of Alabama at Birmingham.
Using concentrations of the green tea preparations that ranged from 1% to 10%, the researchers applied the preparations to the backs of their subjects 30 minutes before exposing the treated areas to a minimal dose of solar stimulated radiation. The green tea extracts cause the skin response to UV radiation to be inhibited. The 10% solution offered almost complete protection at 48 and 72 hours, while the 2.5% solution "was found to provide excellent protection, and in some subjects even a 0.5% solution was able to produce a significant reduction in the sunburn response
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