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New evidence that green tea may help fight glaucoma and other eye diseases

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Public release date: 18-Feb-2010

The effects of green tea catechins in reducing harmful oxidative stress in the eye lasted for up to 20 hours.

 

Scientists have confirmed that the healthful substances found in green tea — renowned for their powerful antioxidant and disease-fighting properties — do penetrate into tissues of the eye. Their new report, the first documenting how the lens, retina, and other eye tissues absorb these substances, raises the possibility that green tea may protect against glaucoma and other common eye diseases. It appears in ACS’s bi-weekly Journal of Agricultural and Food Chemistry.

English: The appearance of green tea at three ...
English: The appearance of green tea at three different stages (from left to right): the infused leaves, the dry leaves, and the liquor. This particular green tea is Xu Fu Long Ya, a fine Chinese green tea from Sichuan. This is a representational visual reference of a large percentage of fine Chinese green tea, though there are varieties that can be different. The infusion colour is a result of a 1.5 minute duration, at 1 g of leaves to 100 ml of water at 70°C. (Photo credit: Wikipedia)

Chi Pui Pang and colleagues point out that so-called green tea “catechins” have been among a number of antioxidants thought capable of protecting the eye. Those include vitamin C, vitamin E, lutein, and zeaxanthin. Until now, however, nobody knew if the catechins in green tea actually passed from the stomach and gastrointestinal tract into the tissues of the eye.

Pang and his colleagues resolved that uncertainty in experiments with laboratory rats that drank green tea. Analysis of eye tissues showed beyond a doubt that eye structures absorbed significant amounts of individual catechins. The retina, for example, absorbed the highest levels of gallocatechin, while the aqueous humor tended to absorb epigallocatechin. The effects of green tea catechins in reducing harmful oxidative stress in the eye lasted for up to 20 hours. “Our results indicate that green tea consumption could benefit the eye against oxidative stress,” the report concludes.

About Post Author

Ralph Turchiano

I have a strong affinity for the sciences which led me to create my sites. My compulsion for the past decade has been reviewing literally every peer-reviewed research article. Which can easily be validated by following my posts. To me, science is where the real news is, as it will mold our destiny beyond that of politics or economics. 😉 Please feel free to e-mail: 161803p314159@gmail.com
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