A healthy gut is characterized by a high degree of microbial richness (diversity), which can help the body to absorb nutrients, synthesize vitamins, and protect itself from pathogens. Diverse gut microbiota can also help to keep the gut barrier intact, decrease inflammation, stimulate the immune system, and even improve cognitive performance and stress tolerance. The diversity of bacteria in your gut is affected by a number of factors, including diet, exercise, hydration, medication, and lifestyle. Taking the right probiotic daily can have a lasting effect on your overall health and well-being.