Fiber2026

Rethinking ethanol consumption and colorectal carcinogenesis: an insight from diet and gut microbiota.

Gómez-Pérez Eva, Ruiz-Saavedra Sergio, Zapico Aida, Suárez Adolfo et al. — Frontiers in cellular and infection microbiology

Summary

Alcohol consumption is a significant risk factor for colorectal cancer. This paper explores how alcohol might increase this risk by affecting our diet and the bacteria living in our gut. It suggests that the complex interplay between what we eat, our gut microbes, and our body plays a crucial role in how alcohol contributes to colon cancer development.

AI-generated summary — read the original

Key points

Alcohol consumption is a recognized risk factor for colorectal cancer.
Changes in gut bacteria are observed in heavy drinkers and those developing colon polyps.
The interaction between diet, gut microbes, and the body likely influences how alcohol contributes to cancer.
Further research is needed to fully understand these complex relationships.

What the study looked at

This paper explores how alcohol consumption, a known risk factor for colon cancer, might interact with our diet and the bacteria living in our gut to promote cancer development. It specifically questions the mechanisms behind alcohol's toxicity and its link to colorectal cancer. This is a "perspective" paper, meaning it critically reviews existing scientific literature on the topic rather than conducting a new experiment. It synthesizes current knowledge about the interplay between diet, gut microbiota, and the host (our body) in the context of alcohol consumption and colon cancer. It also mentions a pilot study in Spain looking at individuals with intestinal polyps, analyzing their anatomical, nutritional, and microbiota data, to provide real-world insights into these interactions. The paper emphasizes that the complex relationship between what we eat, our gut bacteria, and our body is crucial in mediating how alcohol contributes to colon cancer. It highlights that alcohol can alter gut microbiota, and these changes, combined with dietary factors, may increase the risk of developing colon polyps and ultimately cancer. The authors suggest that understanding these interactions is key to developing better prevention strategies.

Dietary takeaway

While this paper focuses on alcohol, it underscores the broader importance of a healthy diet and gut microbiome for colon health. Foods rich in fiber, such as fruits, vegetables, and whole grains, nourish beneficial gut bacteria, which may help counteract some negative effects on gut health. Remember, this is a perspective paper reviewing existing research, and while it offers valuable insights, no single study provides definitive answers.

Abstract

Colorectal cancer (CRC) is a pathology highly influenced by lifestyle and dietary habits, with ethanol consumption recognized as one of the most impactful and modifiable risk factors. Intestinal microbiota alterations have been observed both in high alcohol consumers and in the progression of intestinal polyps to CRC. The diet-microbiota-host interplay has a key role in health and disease. This perspective critically evaluates the mechanistic interplay within this triad and its potential role in mediating alcohol-induced toxicity, as well as its implications for the etiological link between alcohol consumption and CRC risk. Furthermore, we synthesize current advances and delineate key challenges for future research in this area. A particular focus is posed on the analysis of the anatomopathological, nutritional and microbiota data collected from individuals with intestinal polyps in a pilot study carried out in the region of Asturias, Northern Spain.

View on PubMed →DOI: 10.3389/fcimb.2026.1761330