Drinking three to four cups of coffee a day was linked to the strongest associations with liver health in a major study published in Clinical Gastroenterology and Hepatology. The researchers found that coffee consumption, including decaf, was associated with lower risks of cirrhosis or liver cancer, as well as death from liver-related disease. The study’s lead author, Hyunseok Kim, MD, MPH, PhD, a physician-scientist and transplant hepatologist in the Karsh Division of Gastroenterology and Hepatology at Cedars-Sinai Medical Center, said: “These findings add to the growing body of evidence that coffee consumption is associated with better long-term liver health.”
The research analyzed health data from 354,957 UK Biobank adults who had no cirrhosis or liver cancer at enrollment. Over a median follow-up of 13 years, researchers assessed new cases of cirrhosis and liver cancer, along with liver-related deaths. They also examined MRI-derived markers of liver fat and iron, as well as fibrosis and inflammation, alongside blood-protein profiles associated with liver function.
Coffee and Liver Health
The results showed a dose-related pattern: higher reported coffee intake generally corresponded with lower observed risks of serious liver outcomes. Compared with non-coffee drinkers, participants consuming five or more cups daily had a 32% lower risk of cirrhosis. They also had a 47% lower risk of liver cancer and a 42% lower risk of liver-related mortality. Associations were also reported among people drinking one or two cups a day, while the strongest associations were linked to three to four cups daily.
Beyond clinical outcomes, MRI findings in study subgroups included less liver fat and lower iron accumulation, along with fewer markers of fibrosis and inflammation among coffee drinkers. Researchers also examined blood-protein profiles associated with liver function. These imaging and protein findings provide biological context, but they do not establish that coffee caused the differences or apply identically to every participant.
Decaf Counts Too
The reported association extended to both caffeinated and decaffeinated coffee. Similar findings for both types suggest caffeine alone may not explain the relationship, but the study does not prove that antioxidants or other coffee compounds are the cause.
Researchers also considered sugar and sweetener use. The overall disease-risk associations reportedly remained after accounting for sweeteners, while artificial-sweetener consumption was associated with a greater likelihood of selected MRI markers of inflammation and fibrosis. That separate association does not show that artificial sweeteners cause liver damage.
Limits and Cautions
The findings are observational, not the result of a randomized clinical trial, so they cannot establish that coffee directly prevents liver disease. Differences in diet and alcohol use, along with metabolic health, smoking and physical activity, may influence the relationship. It is also possible that people with early health problems changed their coffee habits before diagnosis. The results point to an association, not a clinical recommendation to increase coffee consumption.
The study does not establish a universally safe or optimal number of cups: cup size, brew strength and caffeine content vary, as does individual tolerance. Coffee should not replace measures such as limiting alcohol or maintaining a healthy weight. It should not take the place of managing blood sugar and blood pressure, hepatitis vaccination, appropriate screening or medical care. People sensitive to caffeine, including those with insomnia or anxiety, uncontrolled hypertension or certain heart rhythm disorders, may prefer decaf. Individual dietary choices can be discussed with a healthcare provider.
While the study focuses on coffee’s potential benefits, other simple lifestyle adjustments can also affect health. For example, practical home solutions such as using a damp towel to cool your room, as described in this guide to beating the heat without air conditioning, show how everyday choices can make a difference in well-being.
