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Coffee and the Risk of Hepatocellular Carcinoma: A Systematic Review and Meta-Analysis of Mendelian Randomization Studies.

  • 2025-08-25
  • Gut and liver 20(1)
    • Hyun Bin Choi
    • Hyuk Kim
    • Jeong-Ju Yoo
    • Sang Gyune Kim
    • Young-Seok Kim

Study Design

Type
Meta-Analysis
Population
Five eligible MR studies
Methods
Mendelian randomization (MR) studies using analytical approaches such as inverse variance weighted (IVW), MR-Egger, and weighted median methods
This systematic review and meta-analysis examined the potential causal link between coffee consumption and hepatocellular carcinoma (HCC) risk via Mendelian randomization (MR) studies. Five eligible MR studies that involved the use of analytical approaches such as inverse variance weighted (IVW), MR-Egger, and weighted median methods were included. While previous observational studies suggested a protective role of coffee, the MR-based analyses in this study did not demonstrate a statistically significant association across all methods. IVW analysis yielded an odds ratio of 0.92 (95% confidence interval, 0.58 to 1.47), indicating no significant effect. Moderate to substantial heterogeneity was observed, but no publication bias was detected. These findings suggest that the previously reported inverse association may have been overestimated due to methodological limitations in observational research. Our results emphasize the importance of using genetically informed methods to infer causality, and the results indicate that coffee consumption may not causally reduce the risk of HCC.

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