Probiotics Are Everywhere. Scientists Still Can't Agree if They Actually Help

(Credit: T. L. Furrer/Shutterstock) What if I told you that countless tiny beings living inside your body right now were responsible for everything from the health of your gut to your mental health? It sounds crazy. But, that's exactly what research into the microbiome is showing us. Tens of trillions of bacteria inhabit our bodies -- scientists call them the human microbiome. The past decade or so has seen an explosion of studies linking gut bacteria with all sorts of diseases and conditi