Green tea polyphenols provide photoprotection, increase microcirculation, and modulate skin properties of women.
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Link to full study
http://www.ncbi.nlm.nih.gov/pubmed/21525260
Conclusion of this study
Intake of the green tea polyphenol beverage for 12 wk increased blood flow and oxygen delivery to the skin. Likewise, in a separate, randomized, double-blind, single-dose (0.5, 1.0, and 2.0 g) study of green tea polyphenols, blood flow was maximized at 30 min after ingestion. In summary, green tea polyphenols delivered in a beverage were shown to protect skin against harmful UV radiation and helped to improve overall skin quality of women.
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