If you want to be healthy and have a vibrant gut microbiome, you’ll need to take care of your the bacteria, and postbiotics supplements with bioactive compounds (and more than just fermented foods and ideas here), are the best way to do that, as you’ll learn in this guide. Postbiotics supplements ultimate guide: The fundamentals Approximately 100 trillion microorganisms, mostly bacteria, live in your gastrointestinal tract. These microorganisms, called “gut microbiota,” or gut microbiome, were once thought to control digestion, nutrient absorption, and excretion. Now, scientists have discovered that your gut microbiome is important for your overall health. An imbalance of good and bad gut bacteria (dysbiosis) has been linked to many medical conditions, including obesity, diabetes, chronic kidney disease, and more. 1,2 Multiple studies also show that having a diverse microbiome (a variety of different strains and qualities of bacteria) is crucial to overall health.3,4 What are postbiotics?