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Green tea compounds support improvements in women’s skin elasticity, density, texture and hydration, dermatologists report

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www.ProHealth.com • May 1, 2011


Journal Abstract:

Green Tea Polyphenols Provide Photoprotection, Increase Microcirculation, and Modulate Skin Properties of Women
– Source: Journal of Nutrition, Apr 27, 2011

By Ulrike Heinrich, Carolyn E Moore, et al.

[Note: catechins are a group of polyphenols abundant in green tea, and the catechin EGCG, found in no other plant than tea, is one of the most potent antioxidants yet discovered.]

Dietary constituents including polyphenols and carotenoids contribute to endogenous photoprotection and modulate skin characteristics related to structure and function of the tissue.

Animal and in-vitro studies indicate that green tea polyphenols affect skin properties.

In a 12-week, double-blind, placebo-controlled study, 60 female volunteers were randomized to an intervention or control group.

Participants consumed either a beverage with green tea polyphenols providing 1402 mg total catechins daily or a control beverage.

Skin photoprotection, structure, and function were measured at baseline (week 0), week 6, and week 12.

• Following exposure of the skin areas to 1.25 minimal erythemal dose of radiation from a solar simulator, UV-induced erythema [inflammation] decreased significantly in the intervention group, by 16% after 6 weeks and 25% after 12 weeks.

• Skin structural characteristics that were positively affected included elasticity, roughness, scaling, density, and water homeostasis.

• Intake of the green tea polyphenol beverage for 12 weeks 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 minutes 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.

Source: Journal of Nutrition, Apr 27, 2011. PMID: 21525260. by Heinrich U, Moore CE, De Spirt S, Tronnier H, Stahl W. Institute for Experimental Dermatology, University of Witten-Herdecke, Witten, Germany. [Email: cmoore8@twu.edu]





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