Can Insulin help with gut health?

The question of whether insulin can improve gut health lacks strong clinical evidence. Insulin is primarily a glucose-regulating hormone; its role in the gut is indirect, involving modulation of motility, permeability, and the microbiome via metabolic pathways. Some mechanistic studies suggest insulin may affect intestinal barrier function, but these findings are not translatable to therapeutic use in healthy individuals. Exogenous insulin carries significant risks, including hypoglycemia, and is not approved for gut health. Consumer DNA or microbiome tests, including those from MyBody-X, cannot guide insulin use for this purpose. Current evidence is limited to mechanistic plausibility and remains unclear. For gut health, established interventions like dietary fiber, prebiotics, and medical guidance are recommended. Insulin should only be used under medical supervision for approved indications such as diabetes.