cup of tea
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En kop varm te om dagen kan hjælpe med at forebygge grøns stær.
Der har været mange påstande om gavnvirkninger af drikkelse af te omfattende oral sundhed, færre tilfælde af demens og Alzheimer's sygdommen, nedsat risiko for æggestokkræft og tilsyneladende en mekanisme som nedbryder dit fedt (Jeg vil benytte mig af det efter juleperioden når jeg ikke har bestilt andet end at spise og sidde ned).

Men en undersøgelse i British Journal of Ophthalmology den 14. december viser en anden mulig gavnlig virkning fra at den drikke din morgente: folk som drikker varm te er mindre tilbøjelige til at lide af grøn stær.

Dette blev opdaget af professor i oftalmologi, Anne Coleman, og kolleger ved David Geffen School of Medicine at the University of California, Los Angeles.

Kommentar: Denne artikel er delvis oversat til dansk af fra: Drinking Hot Tea Associated With Reduced Risk of Glaucoma

Glaucoma is a condition whereby fluid pressure builds up inside the eye. The damage this causes to the optic nerve makes glaucoma one of the leading causes of blindness worldwide, affecting almost 60 million people a year.

Coleman et al used data from an annual survey known as NHANES (National Health and Nutrition Examination Survey), which consists of selecting around 10,000 U.S. adults and children and asking them about their lifestyles, taking blood samples and giving them a physical examination. The NHANES survey conducted in 2005/06 happened to include screening for glaucoma also, making it perfect for the team analyse.

Even after controlling for other possible contributing factors such as smoking and diabetes, those who drank at least one cup of hot tea per day had a 74% decreased risk of developing the condition than those who drank none at all.

1678 of the people who took part in the survey had full eye-screenings, of which, 84 (5%) had glaucoma. The results did not indicate when they had received their diagnosis, and did not go into detail about which type of tea people drank or how long they brewed it for.

The data included not only hot tea, but iced tea, coffee, decaff tea and coffee, and sodas. The benefits were only found in those participants who drank hot tea, and not in those who preferred the other beverages. Caffeine has been previously linked to alteration in ocular pressure, and so coffee might have been expected to aid the condition. However, compared to tea, coffee has fewer flavanoids which have been shown to have antioxidant and anti-inflammatory properties and which may be acting to prevent the condition. As for decaffeinated tea, it too has fewer antioxidants than regular tea.

No benefit was found from drinking sodas or iced tea, but for iced tea there is the problem of sample-size: it's just not as popular a drink as the others.

The analysis only shows a correlation, not a causation, and Coleman et al admit that more research would need to be done to investigate the affect in more detail.

You can read the paper by clicking on this link.