2023-10-04 20:43:00
Black tea is rich in polyphenols, like green tea, and other beneficial compounds (Freepik)
Consumption of black tea would reduce the risk of suffering from type 2 diabetes and slow its progression in the case of prediabetes, by improving glycemic control.
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This was determined by a recent study carried out by researchers from the University of Adelaide (Australia) and the Southeast University of China and presented at the Annual Meeting of the European Association for the Study of Diabetes (EASD).
In the work, which was peer-reviewed by the congressional selection committee but not yet published, the researchers found that, compared to never-tea drinkers, daily black tea drinkers had a 53% lower risk of prediabetes and a 47% lower risk of type 2 diabetes.
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And the results were the same even taking into account established risk factors known to drive diabetes risk, including age, sex, ethnicity, body mass index (BMI), average blood pressure, fasting plasma glucose, cholesterol, alcohol consumption, smoking, family history of diabetes, and regular exercise.
People with diabetes usually have a greater renal glucose reabsorption capacity
To find out, the researchers conducted a cross-sectional study with 1,923 adults (562 men and 1,361 women aged 20 to 80) living in eight different provinces in China. In total, 436 participants had diabetes, 352 had a diagnosis of prediabetes, and 1,135 had normal blood glucose levels.
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The study included participants who were regular tea drinkers and others who did not drink tea, and they were asked what type of tea – green, black, dark or another type – and how often they consumed it.
And following analyzing the associations between consumption and excretion of glucose in urine, insulin resistance and glycemic status, they determined that daily tea consumption increases glucose excretion, improves insulin resistance and reduces diabetic risk. .
The benefits, according to the researchers, were greater in the case of black tea.
Consumption of black tea would reduce the risk of suffering from type 2 diabetes and slow its progression in the case of prediabetes, according to the recent study (Freepik)
Black tea is the most popular around the world, followed by green, oolong and white tea.
A study published by the United States National Institutes of Health (NIH) indicated that people who drank at least two cups of tea a day had a 9% to 13% lower risk of death than who didn’t.
Black tea is rich in polyphenols (as is green) and other beneficial compounds, “and these compounds may reduce stress and inflammation in the body,” explained Maki Inoue-Choi, a staff scientist at the National Institutes of Health. and lead author of the study.
“Several studies in recent years have reported important health benefits of tea, including a reduced risk of cardiovascular disease and type 2 diabetes, but the mechanisms underlying these benefits are unclear,” said associate professor co-author of the study. current study, Tongzhi Wu, of the University of Adelaide and a mid-career member of the Hospital Research Foundation Group.
Daily black tea consumers had a 53% lower risk of prediabetes and a 47% lower risk of type 2 diabetes (Freepik)
According to him, “the findings suggest the protective effects of habitual tea consumption on blood sugar control through increased glucose excretion in the urine, better insulin resistance and therefore better sugar control.” in blood “These benefits were most pronounced among daily black tea drinkers.”
Researchers believe these beneficial effects on metabolic control may lie in the unique way black tea is produced, which involves microbial fermentation, a process that can produce unique bioactive compounds (including alkaloids, free amino acids, polyphenols, polysaccharides and their derivatives) that exhibit a powerful antioxidant effect and anti-inflammatory effects. In addition, they improve both insulin sensitivity and the performance of beta cells in the pancreas and change the composition of bacteria in the intestine.
Black tea – Wu concluded – can directly or indirectly modulate glucose reabsorption in the kidneys, something currently done by antidiabetic drugs known as iSGLT2 or “glucosurics,” which have been shown not only to prevent and treat diabetes, but also protect the heart and kidneys.
This is of vital importance, if you think that people with diabetes usually have a greater renal glucose reabsorption capacity, so their kidneys recover more glucose, and prevent it from being excreted in the urine, which contributes to the increase in sugar. in blood
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