The adoption of a westernized gut microbiome in Indian Immigrants and Indo-Canadians is associated with dietary acculturation
Yes, the adoption of a westernized gut microbiome in Indian immigrants and Indo-Canadians is strongly associated with dietary acculturation. The study highlights that dietary acculturation—defined as the shift from traditional dietary practices to the consumption of a more Westernized diet—plays a significant role in shaping the gut microbiome of Indian immigrants and their descendants in Canada.
Key findings from the study demonstrate that:
Shift in Gut Microbial Composition: Indian immigrants to Canada show partial shifts in their gut microbiome after migration, while Indo-Canadians exhibit a more pronounced transition toward a westernized gut microbiome. This transition includes a decline in microbes associated with traditional Indian diets (high in fiber and plant-based foods) and an increase in microbes linked to Western dietary patterns (high in fats, processed foods, and lower fiber).
Impact of Westernized Diets: The study identifies that westernized diets, characterized by higher consumption of ultra-processed foods and lower intake of fiber, are a major driver of microbiome changes. These dietary changes lead to a reduction in traditional diet-associated microbes and an enrichment of microbes suited to metabolizing fats and processed foods, which are common in industrialized environments.
Functional Changes in the Microbiome: Alongside compositional changes, the functional potential of the gut microbiome also shifts. Indians living in India have gut microbiomes enriched in pathways related to complex carbohydrate metabolism and stress tolerance, reflective of their traditional, plant-rich diets. In contrast, westernized cohorts, including Indo-Canadians, exhibit microbiomes with increased functional pathways for fat metabolism and processed food digestion.
Dietary Acculturation vs. Ethnicity: The study underscores that dietary acculturation has a more pronounced influence on the gut microbiome than ethnicity alone. This means that the microbiome changes observed in Indian immigrants and Indo-Canadians are primarily driven by their adoption of Western dietary patterns, rather than inherent genetic or ethnic factors.
Health Implications: The westernization of the gut microbiome in Indian immigrants and Indo-Canadians is associated with a decline in microbial diversity and the loss of traditional diet-associated microbes, which may increase the risk of inflammatory bowel disease (IBD) and other metabolic diseases. This underscores the importance of preserving traditional dietary practices to mitigate these health risks.
In summary, the study firmly establishes that dietary acculturation is a key factor driving the adoption of a westernized gut microbiome in Indian immigrants and Indo-Canadians. This highlights the dynamic nature of the gut microbiome in response to lifestyle changes and emphasizes the need to consider dietary preservation as a strategy for promoting gut health and reducing disease risk in immigrant populations.
