The microbiome refers to the collection of microorganisms—such as bacteria, viruses, fungi, and other microbes—that live in and on the human body. These microbes play crucial roles in processes like digestion, immune function, and even mental health. The microbiome is particularly abundant in the gut, but it also exists on the skin, in the mouth, and in other mucosal areas. The human microbiome is highly diverse, and the composition of these microbes can vary between individuals. A balanced microbiome is essential for good health, while disruptions or imbalances (a condition known as dysbiosis) have been linked to a variety of health problems, including gastrointestinal disorders, obesity, autoimmune diseases, and even mental health conditions like depression and anxiety. Research into the microbiome is ongoing, with scientists exploring how diet, lifestyle, antibiotics, and other factors influence the microbial communities within our bodies.