The gut microbiome is all the organisms living in your gastrointestinal tract. There’s a lot of these- some are good, some are bad, but as a whole diversity in your gut bacteria is a good thing. A healthy gut with a diverse microbiome supports many important bodily functions such as your immune system, metabolism, digestion, and even mental health. In contrast, poor gut health can lead to irritable bowel syndrome, constipation, heartburn, bloating, and gas pain.