Why tea is good for you and how to make the perfect cup

Drinking some types of tea is linked to a lower risk of diabetes

Research published on Saturday showed that drinking at least four cups of any of these teas per day was associated with a 17% lower risk of developing type 2 diabetes over an average 10-year period. The research, which has not yet been published in a scientific journal, will be presented at the annual meeting of the European Association for the Study of Diabetes in Stockholm this week.

Xiaying Li, first author of the research and a graduate student at Wuhan University of Science and Technology in China, said the relationship between tea drinking and the risk of type 2 diabetes has been studied previously, but the results have been inconsistent.

“Our study showed that the association between tea consumption and[type 2 diabetes]depends on the amount of tea consumed,” he told me by email. “Only adequate tea consumption can show clinical effects.” “Based on our findings, I advise the public to have more tea in their daily lives, if appropriate.”

The authors of the abstracts first studied 5,199 adults with no history of type 2 diabetes who participated in China Health and Nutrition Survey (CHNS). The CHNS study is a prospective study looking at the economics, social issues and population health of nine Chinese provinces. They were recruited in 1997 and followed until 2009. At the start of the study, participants provided information about lifestyle factors such as eating and drinking habits, exercise, smoking and alcohol consumption.

Initially, the researchers found that the tea drinkers and non-drinkers in their study had a similar risk of developing type 2 diabetes.

But when the researchers decided to look at whether the amount consumed among tea drinkers made a difference by conducting a systematic review of 19 cohort studies involving more than 1 million adults from eight countries, the results were different — the more cups of green tea, oolong or When participants drank black tea daily, the risk of developing type 2 diabetes decreased. The measurements that were tracked across these studies were whether participants drank less than one cup of tea per day, one to three cups per day, four or more .)

The authors caution that their research does not prove that drinking tea reduces the risk of type 2 diabetes, but they do suggest that drinking tea likely contributes to it, according to a press release. They also noted that they relied on participants’ own assessments of their tea consumption and could not rule out the possibility that unmeasured lifestyle and physiological factors might influence the results.

Experts who were not involved in the research agreed with the authors acknowledging the limitations of the current research.

“It may be that people who drink more tea are avoiding or drinking more often or equivalent harmful sugary drinks, or they have other health behaviors that lead them to have a lower risk of type 2 diabetes,” Naveed Starr, professor of metabolic medicine. at the University of Glasgow, in a statement.

“The results should be taken with a pinch of salt (or a cup of tea),” Kevin McConway, emeritus professor of applied statistics at the Open University in the UK, said in a statement. “The problem with the results of the meta-analysis is that the devil is always in the details, and we don’t have the details. What studies were included? What were their quality? Who were the people, and from which countries, were they studied?”

Lee said more research needs to be done to determine exactly how green, black or oolong tea — and how much is consumed — might affect type 2 diabetes risk. new version.

“Certain components in tea, such as polyphenols, may reduce blood glucose concentration by inhibiting α-glucosidase activity and/or inhibiting the activity of other enzymes, but a sufficient amount of the bioactive substance is required to be effective,” Lee said. .

Cups of coffee and tea in the morning may be associated with a lower risk of stroke and dementia
Polyphenols are a substance found in many plants that gives some flowers, fruits and vegetables their colour, according to the National Cancer Institute. Polyphenols contain antioxidant properties, which can help prevent or delay cell damage in the body. biologically active substances Nutrients or non-nutrients in foods that affect how the body functions.

The take-home message is that lifestyle choices are important for managing type 2 diabetes risk, Duane Mellor, a registered dietitian and senior teaching fellow at Aston University in Birmingham, UK, said in a statement. Mellor was not involved in the research.

In addition to keeping your kettle on the boil, getting regular exercise, eating enough fruits, vegetables, and grains, and using alternative sweeteners have also been associated with a lower risk of type 2 diabetes or better disease control.

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