When we think about slowing aging, diet and exercise often come to mind first. But as Fight Aging notes, animal studies suggest that the composition of the gut microbiome is at least as important as these factors in influencing the pace and progression of aging. Both diet and exercise influence the gut microbiome too—nothing in the body acts in isolation. The microbiome changes with age, and approaches that restore a more youthful balance have shown promise in animal models for improving muscle and brain health. This suggests that targeting the microbiome through probiotics, prebiotics, or dietary shifts could be a powerful strategy to combat age-related decline, such as sarcopenia and cognitive impairment. In Scandinavia, we have a rich tradition of fermented foods and high-fiber diets that naturally support gut health. Perhaps the key to healthier aging lies not just in what we do, but in the trillions of microbes we host. While human trials are needed, the evidence so far is compelling. It’s time we start paying as much attention to our microbiome as we do to our gym routines and meal plans.