Lower Death Risk in People With Diabetes Who Drink Green Tea and Coffee Daily
According to research published in the online journal BMJ Open Diabetes Research & Care, people with type 2 diabetes who consume a lot of green tea and coffee have a lower risk of dying from any cause.
Over a period of about five years, those who drank four or more cups of green tea and two or more cups of coffee per day had a 63% lower risk of death.
Diabetes type 2 increases the risk of cardiovascular diseases, dementia, cancer, and bone fractures. And even though there are more and more drugs that work, lifestyle changes like exercising and eating better still make up the majority of treatment.
Due to the numerous bioactive compounds in green tea and coffee, previously published research suggests that they may be beneficial to health when consumed regularly.
However, very few of these studies have included diabetic subjects. As a result, the researchers decided to investigate the potential relationship between the risk of death among people with the condition and green tea and coffee, both on their own and in combination
For an average of just over five years, they monitored the health of 4923 Japanese people with type 2 diabetes—2790 men and 2133 women, with an average age of 66.
They were all enrolled in the Fukuoka Diabetes Registry, a prospective multi-center study examining the effects of lifestyle and medication on type 2 diabetes patients' lifespans.
Each of them filled out a 58-item food and drink questionnaire, which asked them how much coffee and green tea they drank each day. In addition, they provided background information on lifestyle factors like regular exercise, smoking, consuming alcohol, and sleeping patterns.
In addition, blood and urine samples were taken, and measurements of height, weight, and blood pressure were taken to look for underlying risk factors
607 of the people who took part did not drink green tea; 1143 consumed up to one cup daily; 1384 consumed 2-4 cups; and, furthermore, 1784 drank at least 4.994% of the participants who did not consume coffee; 1306 consumed up to one cup per day; 963 consumed a cup daily; whereas 1660 drank at least two cups.
Drinking up to 1 cup of green tea a day is associated with a 15% lower risk of death, while drinking two to three cups is linked to a 27% lower chance. There was a 40% reduction in risk associated with drinking four or more cups per day. 309 people, 218 men and 91 women, died during the monitoring period, with cancer and cardiovascular disease being the leading causes of death (114)
Up to one cup of coffee per day was associated with a 12% lower risk among coffee drinkers, while consuming one cup daily was linked to a 19% lower death risk
The researchers explain that we don't fully understand the biology behind these observations. Along with caffeine, green tea contains several antioxidant and anti-inflammatory compounds like phenols.
Numerous bioactive components, including phenols, are also present in coffee. Caffeine is thought to alter insulin production and sensitivity, in addition to having the potential to harm the circulatory system. A prospective cohort study found that greater consumption of green tea and coffee was significantly associated with lower all-cause mortality. The researchers conclude that "the effects may be additive"
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