People who drink coffee daily, even up to four cups per day, are less likely to die from heart disease, neurological disease, type 2 diabetes or suicide than others, according to a new study.
Researchers did not test how upping coffee consumption would change health outlooks, so they cannot conclude that coffee “causes” a decreased risk of death. Rather, they looked at death trends in groups with varying amounts of coffee consumption.
“The main takeaway is that regular consumption of coffee can be incorporated into a healthy diet,” said senior author Dr. Frank Hu of the Harvard School of Public Health in Boston.
“There is no evidence of harm of regular consumption in terms of chronic disease risk or mortality, and consistent evidence that consumption of coffee reduces the risk of diabetes and cardiovascular disease,” he said.
The Harvard research team studied the association of coffee intake – caffeinated, decaffeinated, or both - and risk of death based on self-reported coffee habits of more than 160,000 women in the Nurses’ Health Study and Nurses’ Health Study 2 and 40,000 men in the Health Professionals Follow-Up Study.
Every four years, participants in these studies filled out questionnaires on lifestyle factors, including how often they usually consumed caffeinated or decaffeinated coffee, ranging from never to six or more times per day.
The researchers had data on the participants from the mid-1980’s or early 1990’s through 2012.
Those who reported drinking one to five cups of any type of coffee per day were less likely to have died during follow-up than those who did not drink coffee.
Death from heart disease, neurological disease and suicide was less common among moderate coffee drinkers than among others, but there was no relationship with deaths from cancer.
“The benefit in terms of mortality is very small,” and leveled out at four to five cups per day, the researchers said.
For diabetes and cardiovascular disease, caffeinated and decaffeinated coffee seem to have similar effects, so the benefits may be due to compounds in the coffee other than caffeine.
But for neurodegenerative disease, depression and suicide, most likely the benefits are due to caffeine.
Source: Circulation, November 16, 2015.
All research on this web site is the property of Leslie Beck Nutrition Consulting Inc. and is protected by copyright. Keep in mind that research on these matters continues daily and is subject to change. The information presented is not intended as a substitute for medical treatment. It is intended to provide ongoing support of your healthy lifestyle practices.