New research suggests that the health perks of morning coffee extend beyond just waking you up. A significant study has linked coffee consumption to lowered risks of severe liver disease, liver cancer, and liver-related deaths.
This study, published in Clinical Gastroenterology and Hepatology, analyzed data from 354,957 people who participated in the UK Biobank. Researchers followed individuals, all initially free from cirrhosis or liver cancer, for about 13 years.
Those who consumed one to two cups daily had a 20% reduced risk of developing cirrhosis, along with a 31% drop in liver-related mortality compared to non-coffee drinkers. Interestingly, these protective benefits increased with higher coffee intake.
Participants who drank five or more cups a day saw a 32% lower risk of cirrhosis, a 42% reduction in liver-related deaths, and a 47% decline in the likelihood of developing hepatocellular carcinoma, the most common type of primary liver cancer.
While earlier studies hinted at coffee’s potential benefits for liver health, this research provides biological evidence to back up those statistical trends, according to the researchers.
To delve deeper into why coffee might be protective of the liver, the team looked at imaging data from nearly 29,000 participants, alongside blood samples from about 50,000 individuals.
The findings indicated that heavy coffee drinkers had lower levels of liver fat and liver iron while facing reduced odds of developing fibroinflammation, which often precedes serious liver damage.
The blood analysis also showed that coffee consumers had lower levels of proteins associated with inflammation and tissue scarring, as well as elevated levels of proteins important for healthy liver function.
Notably, the benefits to liver health appeared to be similar for both caffeinated and decaffeinated coffee, suggesting that these advantages might come from compounds in coffee unrelated to caffeine.
Moreover, while these benefits stayed consistent whether coffee was enjoyed black or with sweeteners, it was noted that adding sugar or artificial sweeteners slightly diminished the protective effects, particularly regarding liver inflammation markers.
These results imply that coffee could be a simple dietary choice to enhance liver health, though the authors stressed that it shouldn’t replace standard preventative health measures.
However, it’s worth noting that since the research relied on self-reported dietary questionnaires, the accuracy of coffee consumption data might fluctuate over time. Additionally, as this is observational research, it establishes a strong correlation but does not prove direct cause and effect, as various other factors could also influence the outcomes.
