Posts tagged with "British Journal of Opthalmology"

Have a ‘cuppa’: 74% fewer tea drinkers develop glaucoma

January 9, 2020

According to the Glaucoma Research Foundation, more than 3 million Americans have glaucoma—the second leading cause of blindness worldwide—but in England, only 480,000 suffer from the same condition, the National Eye Research Centre estimates.

Could the Brits’ affection for a cuppa tea, rather than a mug of coffee, be protecting their eyesight?

According to findings of a study published in the British Journal of Opthalmology, drinking at least one cup of hot tea daily can reduce your risk of developing glaucoma.

The study, which was conducted by scientists from the University of California, involved volunteers who consumed hot tea at least once per day. Findings showed that regular tea drinkers enjoy an incredible health benefit: They were fully 74 percent less likely to develop a condition called glaucoma, according to a report by the UK’s National Health Service. .

Strangely enough, other beverages such as coffee, iced tea, and soda didn’t improve the eye health of the participants.

A person with glaucoma experiences interocular pressure, or a buildup of fluid pressure in their eye. This pressure can cause damage to the optic nerve.

For the study, researchers analyzed information gleaned from the 2005-2006 National Health and Nutrition Examination Survey (NHANES), an annual survey done in the United States. The NHANES aims to collate data and tests to provide an accurate picture of the health and nutritional status of adults and children.

The researchers reported that out of the 10,000 people involved in the annual survey, about 1,678 had full eye test results. Findings showed that 84 of the adult participants have developed glaucoma.

Meanwhile, almost half of the participants reported drinking coffee often. Fewer than 10% drank hot tea daily.

Tea, particularly green tea, is rich in antioxidants that have powerful benefits for the human body. Among the benefits of consuming green tea are the following:

  • It contains bioactive compounds—Green tea contains polyphenols such as flavonoids and catechins, which are powerful antioxidants. These nutrients aid in reducing the number of harmful free radicals in our bodies, and also protect our cells and molecules from damage.
  • It can improve brain function—It contains just the right amount of caffeine to keep you awake without making you feel jittery. Green tea also contains the amino acid L-theanine, which can increase dopamine and the production of alpha waves in the brain. Alpha waves indicate calmness and relaxation.
  • It increases fat burning and physical performance—because it ramps up metabolism and short-term fat burning.
  • It contains antioxidants that may reduce the risk of certain cancers—Green tea contains potent antioxidants that are known to combat developing cancer cells; particularly of the breast, prostate, and colorectal varieties.
  • It may lower the risk of Alzheimer’s and Parkinson’s disease in old age — According to animal studies, the catechin compounds in green tea can protect neurons and decrease the likelihood of developing these conditionsl
  • It can kill bacteria in your mouth and improve dental health—The polyphenols in green tea, most notably catechins, can kill harmful bacteria in the mouth. Green tea may also reduce bad breath.
  • It may lower the risk of getting Type-2 diabetes– Green tea has been known to reduce blood sugar levels,a problem for those living with diabetes.

So substitute a cuppa tea for your usual morning coffee and enjoy the results.

Research contact: @NHSEnglandLDN