The typical healthy human will carry over 3 ½ pounds of probiotic bacteria, this is more than the weight of the brain. Probiotics are microorganisms that actively provide health benefits to us all, such as supporting our digestion, helping the symptoms of Irritable Bowel Syndrome and aiding our immune system to ward off infections. The combination of different strains of microorganisms in the gut is unique for every individual – almost like fingerprints!