Five-Country Study Reveals Cultural and Dietary Influence on U.S. Gut Microbiomes
A comprehensive five-country study, The Human Diets and Microbiome Initiative (THDMI), led by the Center for Microbiome Innovation (CMI) at the University of California San Diego, has uncovered significant insights into how cultural and dietary habits influence gut microbiomes, including those in the United States. The study, published in Nature Communications, analyzed 1976 samples and corresponding diet and lifestyle data from industrialized nations: Japan, Mexico, Spain, the United Kingdom, and the U.S. Researchers found substantial differences in food consumption, nutrient intake, and microbial composition across these countries. While some diet-microbiome links were universally consistent with healthy eating, many were country-specific. Strain-level analyses further revealed greater genomic differences among microbes, correlating with the dietary and ecological aspects of each participating country. Co-author Jan Knol, senior director of global research & innovation at Danone Nutricia Research, stated...