Coffee and the liver is back in the news this week, and the headline number is a big one. In a study of more than 355,000 adults followed for 13 years, people drinking five or more cups a day had a 32 per cent lower risk of cirrhosis and almost 50 per cent lower risk of liver cancer than people who drank none. The detail that surprised the researchers: decaf drinkers showed much the same pattern.
The short version: more coffee, lower liver risk, in a dose-response pattern, and it was not the caffeine. Observational, so it cannot prove cause. But it is the largest single analysis yet on the question and it points the same way as a decade of smaller ones.
What the study found
Hyunseok Kim, a transplant hepatologist at Cedars-Sinai Medical Center in California, led an analysis of UK Biobank data published in Clinical Gastroenterology and Hepatology. The 355,000-plus participants had no liver disease at the start and reported their coffee intake by questionnaire. Over an average of 13 years, compared with non-drinkers, people on five or more cups a day had a 32 per cent lower risk of cirrhosis, an almost 50 per cent lower risk of liver cancer, and a 42 per cent lower risk of dying from liver disease.
The relationship was dose-response: more cups, lower risk, step by step. And the association held for both caffeinated and decaffeinated coffee, which the researchers say points to the non-caffeine compounds in coffee, including polyphenols and chlorogenic acids, as the likely contributors.
What it did not find
It is observational. In Kim's own words, the study "cannot prove that coffee directly prevents liver disease". People who drink a lot of coffee may differ in other ways that were not fully captured. The proposed mechanisms are plausible, not established. And it is one population, UK adults, so the numbers may not transfer exactly elsewhere.
A dietitian quoted alongside the study, Meridan Zerner, made the point worth keeping: coffee is one ingredient in liver health, not a substitute for the rest. Weight, alcohol, exercise, blood sugar and hepatitis prevention matter more than any beverage.
Why decaf matters here
Most coffee health stories get read as caffeine stories. This one is not. If the benefit tracks decaf as closely as regular, then whatever is doing the work is in the bean, not the stimulant. For anyone who limits caffeine for sleep, pregnancy, blood pressure or anxiety, that is useful: you do not have to choose between the two.
It also means the quality of the coffee is not irrelevant. Chlorogenic acids and polyphenols are present in all coffee but vary with origin, roast and freshness. A lighter roast generally retains more chlorogenic acid than a dark one. Fresh coffee has more of everything than stale coffee, which is why every bag we sell carries its roast date. None of that has been tested against liver outcomes specifically, so treat it as reasoning, not evidence.
What to do with this
If you already drink coffee, this is a reason to feel fine about it, not a reason to go from two cups to five. The study is an association across a large population, not a prescription. If you avoid caffeine, a good decaf is worth considering on its own merits and this research gives you one more. If you have liver disease or are at risk, your doctor's plan comes first and coffee is a conversation to have inside it.
Also in the news this month: how hot you drink your coffee and coffee and repeat blood clots.
Quick facts
| Study | UK Biobank analysis, Clinical Gastroenterology and Hepatology, led by Hyunseok Kim, Cedars-Sinai |
|---|---|
| Participants | More than 355,000 adults, average 13 years follow-up |
| Cirrhosis, 5+ cups vs none | 32 per cent lower risk |
| Liver cancer, 5+ cups vs none | Almost 50 per cent lower risk |
| Liver-related death | 42 per cent lower risk |
| Caffeinated vs decaf | Similar associations |
| Type of study | Observational. Association, not cause |
Common questions
Is coffee good for your liver?
A large UK Biobank study found people drinking five or more cups a day had a 32 per cent lower risk of cirrhosis and almost 50 per cent lower risk of liver cancer than non-drinkers, with the benefit rising step by step with intake. It is observational, so it shows an association rather than proof.
Does decaf coffee have the same liver benefits?
In this study, yes. The researchers saw similar associations for caffeinated and decaffeinated coffee and suggest the non-caffeine compounds in coffee are responsible.
How much coffee should I drink for liver health?
The study found lower risk at every step up in intake, but it is not a recommendation to drink five cups. Most health guidance treats three to four cups a day as a reasonable ceiling for caffeine. If you want more, decaf showed the same pattern.
Can coffee reverse liver damage?
No study has shown that. This research followed people with no liver disease at the start and looked at who developed it. Anyone with existing liver disease should follow their specialist's advice.
Caffeine not required. Our single origin decaf is roasted weekly in Hurstville and tastes like coffee, because it is.
Sources: Medical News Today, 19 October 2026 and 6 July 2026, reporting Kim et al, Clinical Gastroenterology and Hepatology. This article is general information, not medical advice. Talk to your GP about any health concern.
