Hand sanitizer. Social distancing. Antibiotics. Even before the COVID pandemic, fending off germs has long been considered one of the cornerstones of good health. But what if better health actually went hand-in-hand with embracing the invisible microbes living on, in, and all around us? Our bodies are teeming with microbes. They impact everything from sleep, cognition, mood, heart health, and energy to likelihood of developing dementia, diabetes and some cancers. As groundbreaking new studies are showing, taking care of the microbiome -- inside and out -- can help improve day-to-day health and even help prevent or reverse some of the most common age-related diseases. In this eye-opening and evidence-based book, father-daughter team Dr. Brett Finlay (a microbiologist) and Dr. Jessica Finlay (a specialist in aging) break down what the latest research says about how the microbiome affects not just gut health, but all aspects of physical and mental well-being -- and what readers can do about it.