Singapore Study: Drinking Coffee Cuts Liver Cancer Risk

Liver cancer remains one of the deadliest malignancies worldwide, and for many, especially those in high-risk groups such as older adults of East Asian descent, the fear of developing it is very real. But what if something as common as your daily coffee routine could meaningfully lower that risk? A long-term study centered on Singapore’s Chinese population offers some concrete answers.

The short answer: Yes, drinking coffee—specifically three or more cups a day—was linked to a 44% lower risk of developing liver cancer among over 63,000 middle-aged and older Chinese adults in Singapore. That’s a significant figure backed by over a decade of research.

The Singapore Study: Who Was Involved and What They Found

Launched in 1993, the study focused on more than 63,000 Singapore Chinese individuals aged between 45 and 74. This demographic was chosen due to their relatively higher risk profile for liver cancer. Over the years, researchers tracked their health outcomes—and one clear pattern emerged among regular coffee drinkers.

Participants who consumed three or more cups of coffee per day showed a 44% reduction in liver cancer risk compared to those who drank little or none. The findings were published in the journal Cancer Causes & Control by Associate Professor Koh Woon-Puay (phonetic: Xu Yunpei), who emphasized that these results should ease concerns for coffee drinkers worried about their liver health.

What’s Behind Coffee’s Protective Effect?

According to researchers from the National University of Singapore’s Department of Epidemiology, certain natural compounds found exclusively in coffee beans are likely responsible for the protective effect. Two specific diterpenes—cafestol and kahweol—are thought to play a key role in shielding the liver from damage and disease.

These oily compounds are present in unfiltered coffee and are believed to contribute to coffee’s anti-carcinogenic properties. The study suggests that it’s not just caffeine or general beverage consumption, but these particular coffee-derived molecules that offer the benefit.

Tea and Coffee: A Surprising Contrast

In contrast to the well-established positive reputation of tea, particularly green tea, the same study found no evidence that drinking green tea had any impact on liver cancer prevention. Despite tea’s frequent billing as a healthful drink, this large-scale research did not find it effective in reducing liver cancer risk among the studied population.

This finding challenges the common assumption that tea is always the healthier choice over coffee. In fact, the study’s authors noted that “coffee often has to fight against a bad image, while tea is usually described very positively.” Their work suggests it may be time to reconsider that bias.

More Evidence Coffee Supports Health

This isn’t the only study to highlight coffee’s surprising health benefits. Another project from 2008 found that drinking four or more cups of coffee per day was associated with up to a 30% reduction in the risk of developing type 2 diabetes. While that’s a different condition, it adds to the growing body of evidence that moderate to high coffee consumption can contribute to long-term health in multiple ways.

Frequently Asked Questions

How many cups of coffee per day were linked to lower liver cancer risk in the study?

Drinking three or more cups of coffee daily was associated with a 44% reduction in liver cancer risk among the study participants. This was based on data from over 63,000 Singapore Chinese individuals aged 45–74.

What specific compounds in coffee are thought to protect the liver?

The study points to two coffee-specific diterpenes—cafestol and kahweol—as the likely agents behind coffee’s liver-protective effects. These oily compounds are found naturally in coffee beans and are not present in other beverages like tea.

Did the study find any liver cancer prevention benefit from green tea?

No. The same research found no evidence that drinking green tea had any impact on reducing liver cancer risk. This contrasts with the often more favorable public perception of tea over coffee.

Was the study focused on a specific ethnic group or region?

Yes. The research was conducted among Chinese adults in Singapore, specifically targeting those aged 45 to 74, who were considered to be at higher risk for liver cancer. The study began in 1993 and followed participants for years.

Are the liver cancer risk reductions seen only in heavy coffee drinkers?

The significant 44% risk reduction was observed in people drinking three or more cups per day. Lower levels of coffee consumption were not shown to have the same protective effect in this study.

Does this study suggest coffee is healthier than previously thought?

The study contributes to a growing body of evidence that challenges the idea that coffee is unhealthy. Alongside liver cancer risk reduction, other research has linked coffee to lower risks of type 2 diabetes and other conditions.

Recommended FrontStreet Beans for Coffee Lovers

For coffee drinkers interested in potential health perks along with great flavour, try FrontStreet Coffee’s Ethiopia Yirgacheffe for its bright citrus and floral notes, or the Colombia Narino Huila with its balanced caramel and almond profile. Both are single-origin beans roasted to highlight their natural qualities. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.