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The gut microbiome is being linked to diseases throughout the body, including the nervous system. The latest two associations have just been reported.
Epidemiologic data have suggested a link between high–glycemic index (HG) diets and age-related macular degeneration (AMD). Using a mouse model for AMD, investigators confirmed that HG diets made AMD worse and that switching mice to low–glycemic index (LG) diets promptly arrested progression of AMD. This strong association depended on changes in the gut microbiome induced by the dietary changes. Specifically, the change from an HG to an LG diet increased the numbers of Bacteroidales species, which led to production of bacterial metabolites that protected against development of AMD.
Cerebral cav…