Significant amounts of research have established that tea, including black, green, and white tea, has many intriguing health benefits, including anti-aging. Dozens of studies point to tea’s potent antioxidant as well as anticarcinogenic properties. 
The Journal of Photochemistry and Photobiology (December 31, 2001) stated that the polyphenols “are the active ingredients in green tea and possess antioxidant, anti-inflammatory and anticarcinogenic properties. 
Green tea and the other teas (e.g., white tea, which is what green tea begins as) show a good deal of promise for skin, but they are not the miracle that cosmetics and health food companies make them out to be. Most researchers agree that tea (black, green, or white) has potent anti-inflammatory properties and that it is a potent antioxidant whether consumed orally or applied topically. [3,4,5] Current research also indicates that epigallocatechin-3-gallate (EGCG), green tea’s active component, can prevent collagen breakdown and reduce UV damage to skin, which is a very good reason to use skincare products that contain one or more forms of tea. 
- Heinrich U, Moore C, De Spirt S, Tronnier H, Stahl W. Green tea polyphenols provide photoprotection, increase microcirculation, and modulate skin properties of women. J Nutr. 2011;141(6):1202-8.
- Katiyar S, Bergamo B, Vyalil P, Elmets C. Green tea polyphenols: DNA photodamage and photoimmunology. J Photochem Photobiol B. 2001;65(2-3):109-14.
- Oyetakin White P, Tribout H, Baron E. Protective mechanisms of green tea polyphenols in skin. Oxid Med Cell Longev. 2012;2012:560682.
- Katiyar S. Skin photoprotection by green tea: antioxidant and immunomodulatory effects. Curr Drug Targets Immune Endocr Metabol Disord. 2003;3(3):234-42.
- Katiyar S, Perez A, Mukhtar H. Green tea polyphenol treatment to human skin prevents formation of ultraviolet light B-induced pyrimidine dimers in DNA. Clin Cancer Res. 2000;6(10):3864-9.
- Katiyar S, Afaq F, Perez A, Mukhtar H. Green tea polyphenol (-)-epigallocatechin-3-gallate treatment of human skin inhibits ultraviolet radiation-induced oxidative stress. Carcinogenesis. 2001;22(2):287-94.