Gut flora refers to the microorganisms that live in our digestive system, specifically in the gut. These organisms include bacteria, yeasts and other microbes which play a crucial role in maintaining good health by helping with digestion, regulating immune response, producing vitamins and preventing overgrowth of harmful bacteria. A balanced gut flora is essential for overall well-being and any imbalance can lead to various health issues such as gastrointestinal problems or autoimmune disorders.