Coffee and Tea May Protect Against Chronic Liver Disease

If you're at risk for chronic liver disease—whether due to heavy drinking, obesity, diabetes, or excess iron—you’ve likely wondered whether something as simple as your daily brew could make a difference. A major U.S. study now offers some concrete answers.

People who drank more than two cups of coffee or tea per day had half the risk of developing chronic liver disease compared to those who drank less than one cup daily, according to a 19-year study tracking over 9,800 people.

The Study Behind the Claim

Published in the medical journal Gastroenterology, the research was led by Dr. Constance Ruhl of the U.S. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) along with colleague Dr. James Everhart. The team analyzed data from the First National Health and Nutrition Examination Survey and its subsequent follow-ups. They monitored 9,849 participants over an average of 19 years, tracking their daily intake of coffee and tea—ranging from zero to 16 cups per day.

Key Findings on Coffee and Tea Intake

The results were clear: individuals consuming more than two cups of coffee or tea daily showed a significantly lower risk of chronic liver disease. Specifically, their risk was reduced to approximately half that of individuals who drank fewer than one cup per day. This protective effect was observed regardless of whether the beverages were caffeinated or not, although the study did not break down types of tea or brewing methods.

Who Benefits Most?

Dr. Ruhl emphasized that while the findings are promising, it’s too early to officially recommend increased coffee or tea consumption for everyone. However, the results suggest a practical, accessible way for those already at higher risk—including individuals with alcohol dependency, obesity, diabetes, or iron overload—to potentially lower their chances of developing liver disease. Importantly, the study did not find evidence that coffee or tea reduces the risk of liver disease stemming specifically from fatty liver or viral hepatitis.

How Coffee and Tea Might Protect the Liver

This isn’t the first time coffee has been linked to better liver outcomes. Prior studies have also shown that coffee drinkers tend to have lower risks of both cirrhosis and liver cancer. While the exact mechanism remains under investigation, researchers believe caffeine plays a partial role. The current study echoes that idea, suggesting that some protective effect is likely tied to caffeine—but further research is needed to fully understand the biological pathways involved.

Frequently Asked Questions

How many cups of coffee or tea reduce liver disease risk?

Drinking more than two cups of coffee or tea per day was associated with a 50% lower risk of chronic liver disease compared to drinking less than one cup per day, based on a 19-year study of over 9,800 people.

What types of liver disease does coffee help prevent?

The study found a reduced risk of chronic liver disease overall, including conditions like cirrhosis and liver cancer. However, it did not show a protective effect specifically against fatty liver disease or viral hepatitis.

Does decaf coffee offer the same liver protection?

The study did not separate caffeinated and decaffeinated beverages, but it did suggest that caffeine may contribute to the protective effect. More research is needed to confirm whether decaf offers similar benefits.

Who is considered high-risk for chronic liver disease?

High-risk groups include people who drink heavily, are overweight or obese, have diabetes, or have excessive iron levels in the body. These individuals may benefit most from the observed liver protection.

Should I start drinking more coffee or tea for my liver?

While the results are promising, researchers advise against making changes to your coffee or tea intake based solely on this study. It’s best to consult with a healthcare provider, especially if you have underlying health conditions.

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