Populations of microbes, or gut bacteria, that call the human body their home, can number in the trillions and are a combination of good and bad bacteria, each with their own very distinct job. Good gut bacteria helps in the digestion of foods, maintains a healthy gut, provides nutrients and vitamins and fights off bad bacteria while too much bad gut bacteria can cause a number of health conditions, including gas, bloating, constipation, Crohn's disease, IBS, ulcerative colitis, weight gain and even cancer. While it may seem like common sense to rid the body of all bad gut bacteria, the key is to actually balance these two bacteria.