Your gut microbiome is a huge reflection of your health. Made up of both "good" and "bad" microbes; the gut microbiome relies on a balance in microbe populations. An imbalanced gut microbiome can lead to an overgrowth in harmful microbe colonies, including yeasts like Candida and bacteria like E. coli. There are ways to test what's in your gut and see if you have a microbial equilibrium, including an at-home test you can do without having to send anything to a lab.