NOW Foods - Probiotic-10 Healthy Intestinal Flora 25 Billion CFU - 30 Vegetarian Capsules NOW Foods Probiotic-10 Healthy Intestinal Flora offers a balanced spectrum of live organisms consisting of acid-resistant probiotic bacterial strains that are known to naturally colonize the human GI tract. Probiotic bacteria are critical for healthy digestion help maintain the integrity of the intestinal lining support proper intestinal motility and participate in the detoxification process.