What are the beneficial functions of normal flora?

Normal flora, or the microbiota, play several beneficial roles in human health. They help maintain the balance of microbial communities, preventing harmful pathogens from colonizing the body. Additionally, they aid in digestion and nutrient absorption, produce essential vitamins like vitamin K and certain B vitamins, and contribute to the immune system by enhancing immune responses and protecting against infections. Overall, normal flora support overall health and homeostasis within the host.