There are trillions of bacteria, fungi, viruses, and other microbes living in your body. Most of these are found in your intestines, collectively known as your gut microbiome. Some are bad and make you sick, but even more are beneficial and nurture your health. The gut microbiome plays a crucial role in health and preventing disease. These microorganisms help with the digestion of foods, synthesize some vitamins, contribute to normal immune function, and produce important che