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posted by takyon on Sunday December 17 2017, @11:50PM   Printer-friendly
from the small-study dept.

Drinking a cup of hot tea at least once a day may be linked to a significantly lower risk of developing the serious eye condition, glaucoma, finds a small study published online in the British Journal of Ophthalmology.

But drinking decaffeinated and caffeinated coffee, decaffeinated tea, iced tea and soft drinks doesn't seem to make any difference to glaucoma risk, the findings show.

[...] After taking account of potentially influential factors, such as diabetes and smoking, hot tea-drinkers were 74 per cent less likely to have glaucoma.

But no such associations were found for coffee -- caffeinated or decaffeinated -- decaffeinated tea, iced tea or soft drinks.

This is an observational study so no firm conclusions can be drawn about cause and effect, and the absolute numbers of those with glaucoma were small. Information on when glaucoma had been diagnosed was also unavailable.

Connie M Wu, Annie M Wu, Victoria L Tseng, Fei Yu, Anne L Coleman. Frequency of a diagnosis of glaucoma in individuals who consume coffee, tea and/or soft drinks. British Journal of Ophthalmology, 2017; DOI: 10.1136/bjophthalmol-2017-310924

Source: http://www.bmj.com/company/newsroom/drinking-hot-tea-every-day-linked-to-lower-glaucoma-risk/


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  • (Score: 3, Funny) by Bogsnoticus on Monday December 18 2017, @12:15AM (4 children)

    by Bogsnoticus (3982) on Monday December 18 2017, @12:15AM (#611174)

    If drinking tea reduces the risk of it, and smoking MJ is a treatment for glaucoma, then surely drinking "green" tea is the best, all-round solution?

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  • (Score: 2, Disagree) by Azuma Hazuki on Monday December 18 2017, @07:24AM (2 children)

    by Azuma Hazuki (5086) on Monday December 18 2017, @07:24AM (#611305) Journal

    It's specifically hot tea from C. sinensis they're thinking of. If I had to guess at a mechanism of action I'd say it's the heat increasing circulation a bit plus L-theanine and all those delicious polyphenols doing their thing. I drink 2-4 cups a day so may be a little biased, of course...

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    • (Score: 0) by Anonymous Coward on Monday December 18 2017, @05:49PM (1 child)

      by Anonymous Coward on Monday December 18 2017, @05:49PM (#611494)

      "But drinking ... decaffeinated tea ... doesn't seem to make any difference to glaucoma risk, the findings show."

      • (Score: 2) by Azuma Hazuki on Tuesday December 19 2017, @04:51AM

        by Azuma Hazuki (5086) on Tuesday December 19 2017, @04:51AM (#611710) Journal

        That doesn't mean the caffeine itself is the causative agent though. Very few things in nature are that simple. Suppose the caffeine is synergizing with something else?

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        I am "that girl" your mother warned you about...
  • (Score: 0) by Anonymous Coward on Monday December 18 2017, @02:03PM

    by Anonymous Coward on Monday December 18 2017, @02:03PM (#611385)

    Haha. Just what I was thinking. I usually have a cup of tea, earl grey, hot to start the day, then switch to green tea in the afternoon (which has less caffeine), and finally green herb in the evening. It sounds like I can rest assured I will never be at risk for glaucoma!