Gut Microbiome And Sleep All of the microbes that live in our intestines are known as the gut microbiome. Some even call it our “second brain” because it influences so many processes (not just breaking down food) – our mood, mental health, hormone production, and sleep, to name a few. Via: https://www.sleepline.com/wpcontent/uploads/2019/09/091119_Gut_and_Sleep_Infographic_v2-page001-1-502x1024.jpg