Believe it or not, your gut microbiome is the foundation of your health. Good gut health occurs when you have a balance between the good (helpful) and bad (potentially harmful) bacteria and yeast in your digestive system. In fact, 80% of your immune system is in the gut, and the majority of your body’s serotonin is, too. This means if your gut isn’t healthy, then your immune system and hormones won’t function, and you will get sick