Your morning cups of coffee and tea may be associated with lower risk of stroke and dementia

Among more than 360,000 participants studied over a period of 10 to 14 years, those who drank 2 to 3 cups of coffee, 3 to 5 cups of tea, or a combination of 4 to 6 cups of coffee or tea a day had the lowest risk of stroke and dementia. , according to researchers from Tianjin Medical University in Tianjin, China.

“Our results suggested that moderate consumption of coffee and tea separately or in combination was associated with lower risk of stroke and dementia,” the authors of the study said in a publication.

Around the world, 10% of deaths are caused by stroke, according to a 2017 study published in The Lancet. Dementia refers to a general decline in brain function, but it can occur after a stroke.

Drinking coffee or tea alone was also associated with a lower risk of both conditions, but people who received 2 to 3 cups of coffee and 2 to 3 cups of tea daily – 4 to 6 cups in total – did best with a 28% lower risk for dementia and 32% lower risk of stroke than those who did not drink, according to the study.

Participants’ information came from UK Biobank, a database of anonymous health information from around half a million UK volunteers collected between 2006 and 2020. The study looked at health participants aged 50 to 74 who self-reported their coffee and tea consumption.

During the study period, 5,079 participants developed dementia and 10,053 experienced at least one stroke, according to the study, which was published in PLOS Medicine.

Previous research supports that coffee may be associated with cardiovascular and brain benefits.

There have been many studies suggesting that health benefits may be associated with drinking coffee and tea, but it is important to note that researchers could only say that the two were related – not that the beverages necessarily provided protection.

There are limitations to the accuracy of the data because participants reported their own tea and coffee drinking, and their estimates could be influenced by their own bias, Dr. Lee H. Schwamm, chairman of the American Stroke Association Advisory Committee and chairman of Vascular Neurology at Massachusetts General Hospital, said via email.

“We can not attribute causality and say ‘drinking more coffee or tea is good for your brain’. What we can only say is that in this study, people who reported moderate coffee / tea were less likely to have a stroke. or dementia occurs in the 10 years after follow-up, “Schwamm said.

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Previous research has suggested that coffee may be beneficial for brain health.

Another study from 2021, using the UK Biobank, showed that for people without a diagnosis of heart disease, a regular coffee consumption of 0.5 to 3 cups of coffee a day was associated with a reduced risk of death due to heart disease, stroke and early death for whatever reason. compared to non-coffee drinkers.
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Caffeinated coffee can help the brain in several ways by increasing the production of granulocyte colony-stimulating factor, according to the British Alzheimer’s Society. Called G-CSF, it helps protect and repair neural brain cells.

Neither decaffeinated coffee nor caffeine alone was found to help in this way, “suggesting that there could be a combination effect between caffeine and an unknown compound in coffee,” the community said.

More is not always better when it comes to coffee. People who drank more than 6 cups a day had an increased risk of dementia and smaller overall brain volumes, according to a study published in June in the journal Nutritional Neuroscience.

The results of the latest study may point to some benefits of drinking coffee and tea, but that does not necessarily mean that everyone should start brewing more cups during the day.

“A word of warning, one man’s cappuccino is another man’s expresso,” Schwamm said. “Not all coffee drinks have the same amount of caffeine, and people rate a cup of coffee or tea differently, so we should keep in mind that most things are best consumed in moderation.”

If you have previously avoided caffeinated beverages, there may have been a good reason and there is as yet no evidence that there is a benefit to starting a coffee or tea habit, he added. For most things, moderation is the best approach, Schwamm said.

“Enjoy your morning cup of coffee, and do not swear by additional cups if you enjoy them,” he concluded.


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