When the intestinal microflora is in good balance, there are several potential health benefits, including aiding in the prevention of some conditions and illnesses (Shi et al., 2004). There is evidence that some intestinal bacteria have the ability to manufacture vitamins. Normal, healthy intestinal microflora may also help strengthen the body's immune system to resist pathogens. When the intestinal microfloral balance shifts in favor of beneficial microbes, the pH of the intestine tends to shift downward, creating a less desirable environment for pathogenic bacteria and promoting other health benefits. This is the result of an increase in the levels of lactic, butyric and acetic acids produced as the numbers of beneficial bacteria in the intestinal tract increase.