Type-2 diabetes is one of the most common conditions in America, with more than 1 in 10 adults living with it, according to the Centers for Disease Control and Prevention (CDC).
Globally the disease affects around 422 million people. And while medication can successfully reduce the risks of the disease, any drug regime is likely to be costly and may come with side-effects, so beneficial lifestyle changes, like watching what you eat and drink, are encouraged.
How does green tea help you stay healthy?
Previous studies have looked at the benefits of green tea, with some showing that it lowers the risk of developing diabetes, and others showing that it may generally improve glucose control and insulin sensitivity.
However, a new study performed by researchers out of Kyushu University, Fukuoka Dental College, and Hakujyuji Hospital in Japan looked at those who already have type-2 diabetes to see how green tea affected them.
The scientists studied 4,923 patients, with an average age of 66, for a period of over five years. Allowing for other variables, the researchers found that those who just drank four or more cups of green tea per day had 40 percent lower odds of dying during the study’s follow-up period.
And what about coffee?
Similarly, coffee has been shown to lower one’s risk of developing type-2 diabetes, but on this occasion, the researchers looked at those already living with diabetes.
And the study, which published in BMJ Open Diabetes Research&Care, found that drinking two or more cups of coffee per day decreased all-cause mortality by a comparable 41 percent.
But drinking both coffee and green tea has the best effect.
Drinking both caffeinated beverages maximized the benefits.
“The combination of higher green tea and coffee consumption significantly reduced all-cause mortality risk by 63 percent,” the study authors wrote.
Those who drank four or more cups of green tea and two or more cups of coffee unlocked that benefit. The report stressed that other factors are likely to be at play—”Higher educational or income levels may be associated with greater coffee consumption; they may also be related to lower mortality risk,” the researchers note—but it’s more weight to the theory that sensible consumption of coffee and green tea are good for us.