Coffee is one of the world’s most popular beverages, used commonly as a morning or midday pick-me-up due to its stimulating caffeine content. Coffee is the leading source of antioxidants in the Western diet, and it helps reduce the risk of colon cancer. It may also cut the risk of prostate cancer by as much as 50 percent.
For some people, however, coffee may bring on digestive distress, heart arrhythmias and intensify feelings of anxiety if they drink too much.
New research now suggests another benefit of coffee. It may be great for your liver. Three to four cups per day deliver the maximum benefit, according to research at the Universities of Southampton and Edinburgh.
The greatest benefits were found among those who drank fresh ground coffee, but even instant coffee was shown to be helpful in reducing the risk of chronic liver disease.
A vast majority of study participants — 78 percent of those polled, or almost 385,000 participants — drank some type of coffee on a regular basis. This included ground as well as powdered coffees, and caffeinated and decaffeinated varieties. Twenty two percent — about 110,000 — of respondents reported not drinking any type of coffee.
Researchers calculated the number of liver-related events in their study group over a decade and found 3,600 cases of chronic liver disease, along with 5439 cases of fatty liver disease and 184 cases of liver cancer. These conditions resulted in 301 deaths among the study group during the data collection period.
Coffee drinkers were found to have a 49 percent reduced risk of dying from liver disease compared to non-drinkers. They also had a 21 percent reduced chance of developing fatty liver disease and 20 percent less chance of developing chronic liver disease compared to those who drank no coffee at all.
The greatest benefits were found among those who drank fresh ground coffee. Ground coffee contains high levels of two components, kahweol and cafestol, that have been shown in animal studies to boost liver health. But even instant coffee, which has lower levels of these two compounds, was shown to be helpful in reducing the risk of chronic liver disease. Those who drank decaffeinated coffee also were less likely to develop liver disease.
“Coffee is widely accessible and the benefits we see from our study may mean it could offer a potential preventative treatment for chronic liver disease,” said lead study author, Oliver Kennedy, in a statement. “This would be especially valuable in countries with lower income and worse access to healthcare and where the burden of chronic liver disease is highest.”
The study is available in the open-source journal BMC Public Health.