Recent findings from a comprehensive long-term study in the U.S. have emerged, signalling the potential benefits of yogurt consumption in reducing the risk of certain types of colorectal cancer. Published in the journal Gut Microbes, this research analyzed health data from over 132,000 participants, including more than 87,000 women and nearly 45,000 men, tracked over a span of three decades.
Key Findings
The study observed no significant correlation between yogurt consumption and the overall incidence of colorectal cancer. However, specific subtypes of tumours revealed a notable relationship. Participants who consumed at least two servings of yogurt per week were found to be 20% less likely to develop Bifido bacterium-positive tumours, particularly in the proximal colon, when compared to those who indulged in yogurt less frequently — specifically, those consuming less than one serving per month.
This finding suggests that yogurt’s active ingredients may play a protective role, especially against certain aggressive forms of colorectal cancers linked with the presence of Bifido bacterium.
The Role of Bifido bacterium
Bifido bacterium is a prevalent gut microbe that is not only essential for healthy digestion but is also found in various fermented foods, predominantly yogurt. Research indicates that it can be present in tumour tissues of approximately 30% of colorectal cancer cases. It seems to thrive in the low-oxygen environments created by tumours, thereby potentially having an adverse effect by facilitating tumour growth.
Interestingly, the study posits that regular yogurt consumption enhances the intake of Bifido bacterium through dietary means that might help mitigate its harmful effects. Preliminary studies suggest that this bacterium has antioxidant, anti-inflammatory, and immune-boosting properties, which could contribute to gut health and fortifying the intestinal barrier against the translocation of pathogens and carcinogenic factors.
Need for Further Research
While the findings are encouraging, researchers emphasize that the study is observational and calls for more in-depth research to unravel the intricate relationship between yogurt consumption, gut microbiome health, and colorectal cancer risk. Epidemiologist Andrew Chan from Massachusetts General Hospital highlighted that these results contribute to a growing body of evidence connecting dietary habits with cancer risk, yet he advocates for more longitudinal studies to investigate the long-term benefits and biological mechanisms at play.
The authors of the study recommend further exploration into the direct effects of yogurt on different colorectal cancer subtypes and the potential biochemical pathways through which Bifido bacterium may exert its influence.
-NSH Digidesk
