Gut bacteria linked to colorectal cancer risk is more prevalent among African-Americans, according to research. Researchers studied 329 colonic tissue biopsies from patients at the Chicago Colorectal Cancer Consortium. African-Americans had double the maximum amount Bilophila wadsworthia, sulfide-producing, inflammatory bacterium linked to cancer growth in their gut, compared with non-Hispanic white participants. Intake information also showed African-Americans had higher intakes of meat, fat, and animal protein, dietary elements that promote the growth of these microorganism. Researchers suspect a high-fat, high-protein diet alters bile acids and therefore will increase cancer risk.
This data supports recent findings suggesting dietary choices play a bigger role than genetics in the risk of having colorectal cancer.
Yazici C, Wolf PG, Kim W, et al. Race-dependent association of sulfidogenic bacteria with colorectal cancer. Gut. Published February 2, 2017.