How Gut Bacteria Influence Blood Pressure (And Why Salt Isn’t the Whole Story) As scientists continue to study the trillions of microorganisms living in our intestines—collectively known as the gut microbiome—it’s becoming clear that this 3–5 pound ecosystem of bacteria plays a central role in nearly every aspect of human health. In fact, some researchers now believe the microbiome may be more influential than our genes in determining health or disease. One of the most surprising discoveries in recent years is the microbiome’s direct involvement in blood pressure regulation. Salt, Blood Pressure, and the Microbiome Connection It’s long been known that excessive salt intake is associated with high blood pressure. What’s new is how salt appears to exert its effects. Salt Alters Gut Bacteria—and Blood Pressure Follows A landmark 2017 study found that when mice and humans consumed excess salt, beneficial gut bacteria declined while pro…

You know that fresh fruits and vegetables are good for you, but when you feed yourself you’re also feeding trillions of guests. These “guests” are the bacteria (aka microbiota, or tummy bugs) that inhabit your intestines. And according to Justin Sonnenburg, PhD, Assistant Professor of Microbiology and Immunology at Stanford School of Medicine, diet is one of the most powerful impacts on gut microbiota, who feed on fiber-rich carbohydrates found in whole plant foods. Why would you want to treat your tummy bugs as honored guests? Because we have an age-old deal with these guys. We provide them with food and a warm place to live; they help us to digest and absorb food, to synthesize vitamins, to produce amino acids, to secrete mucus, to prevent constipation by increasing motility, to create food for intestinal cells, and, perhaps most importantly, to partner with our immune system (more than 2/3 of which is located in the intestines) by degrading toxins and competing with and killi…