Green Tea Polyphenols, DNA Repair, and Prevention of Photocarcinogenesis
Naturally occurring plant polyphenols constitute a wide variety of phytochemicals which are distributed in plant foods, including fruits, vegetables, seeds, nuts, owers, and bark. Important dietary sources of polyphenols are grape seeds, grape skin, tea, apples, red wine, onions and cacao, and so on (Manach et al. 2004). These polyphenols possess benecial health effects of dietary sources. Among the well-known polyphenols, the polyphenols from tea and more specically from green tea are better known for their health benets in many organs as well as in general health. In this chapter, we particularly discuss and describe the health benets of green tea polyphenols (GTPs) with particular emphasis on protection against ultraviolet (UV) radiation-induced skin cancer through repair of damaged DNA.