Within our bodies, trillions of cells originating from a single-celled zygote work in harmony to create and sustain us. However, residing in our guts is a vast and complex microbiome that, despite its integral role, remains largely unexplored. “The current estimate is that humans have 10 trillion human cells and about 100 trillion bacterial cells,” says Dr. Martin J. Blaser at the New York University School of Medicine. These microbes play an essential role in supporting healthy digestion,...