In the United States, more than 1 in 10 adults have type 2 diabetes. Worldwide, about 422 million people have this disease.
Diabetes increases the risk of a number of health problems, including cancer, bone fractures, dementia, and circulatory diseases.
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While medications can significantly reduce the health risks associated with diabetes, experts also believe lifestyle changes are one of the best ways to combat type 2 diabetes. This includes following a healthy diet, getting more physical, and quitting smoking. if you are a smoker.
Coffee, green tea, and diabetes
Over the years, many scientists have researched the potential health benefits of green tea. Several studies have shown a link between green tea consumption and a lower risk of diabetes.
Other scientists have shown that drinking green tea can improve glucose control and insulin sensitivity. However, until now, few researchers have studied how green tea may benefit people with type 2 diabetes.
Over the years, coffee has also attracted a lot of scientific attention. There is some evidence that high coffee consumption reduces the risk of type 2 diabetes compared to low consumption.
In addition to diabetes, there is evidence that coffee consumption is associated with a reduced risk of death. However, as with green tea, few scientists have investigated this link in people with diabetes.
While studying the health effects of certain foods is challenging, there is growing evidence that green tea and coffee can provide benefits in certain aspects of health.
Recently, researchers from Kyushu University, Fukuoka College of Dentistry, and Hakujuji Hospital in Japan began investigating the effects of coffee and green tea on the risk of death for people with diabetes. They recently published their findings in BMJ Open Diabetes Research & Care.
Study
The scientists collected data from the Fukuoka Diabetes Registry, an ongoing study designed to assess the effects of drugs and lifestyle choices on diabetes outcomes. Overall, they used data from 4923 participants with type 2 diabetes. These people were 20 years of age or older, and the median age was 66 years.
Each participant provided a wide range of information, including details about their current health status, exercise frequency, smoking, alcohol consumption, sleep duration, body mass index (BMI), blood pressure, and symptoms of depression.
It is important to note that participants also provided detailed information about their diet, including coffee and green tea consumption.
The primary endpoint in this study was mortality. The researchers followed the participants for an average of 5.3 years, and during the observation, 309 people died.
For purposes of analysis, the team considered the consumption of four or more cups of green tea and two or more cups of coffee per day to be high.
evidence
People who drank more cups of green tea or coffee per day were less likely to die from any cause compared to those who did not. The lowest chances were associated with consuming large amounts of green tea and coffee.
Even after considering the variables that may have influenced their analysis, the authors conclude:
"[P] higher consumption of green tea and coffee was significantly associated with lower all-cause mortality in [people] with type 2 diabetes."
The authors explain that "the combination of increased consumption of green tea and coffee significantly reduced the risk of all-cause death by 63%" over a median follow-up of 5.3 years.
Looking at coffee alone, the researchers found that drinking two or more cups a day was 41% less likely to die during follow-up.
When calculating the chances of death among green tea drinkers, they found that drinking four or more cups a day was associated with a 40% lower chance.
However, the daily consumption of both drinks had the greatest effect:
- two to three cups of green tea plus two or more cups of coffee - 51% less
- four or more cups of green tea plus a cup of coffee - 58% less
- four or more cups of green tea and two or more cups of coffee - 63% less
Research limitations
As with most studies examining the impact of one type of food or drink on a population, this study has certain limitations.
For example, information on coffee and green tea consumption by each participant was obtained from a questionnaire. No one has a perfect memory and this leads to inevitable data errors. Likewise, dietary information was only obtained from participant reports at the start of the study, but after 5 years, alcohol consumption habits may change.
In addition, the researchers did not collect information on certain factors that could influence the results, such as educational level and household income. The authors explain the potential importance of this:
“Higher education or income may be associated with higher coffee consumption; they may also be associated with lower mortality risk. "
Moreover, most importantly, the study was observational, so it is impossible to prove that green tea and coffee reduce the chances of death - only that consumption of these drinks is associated with lower chances.
While it is important to be aware of these important limitations, these results contribute to the body of evidence that green tea and coffee may benefit some people in one way or another. Medical News Today posted a broader discussion of the potential benefits of coffee here.
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