DESC: Primal Defense ULTRA is the ultimate high potency, broad-spectrum probiotic formula. Three capsules per day provide a 15 billion live cell count of 13 species of beneficial cultures including soil-based probiotics called Homeostatic Soil Organisms (HSOs). HSOs play a positive role in digestive health by supporting a healthy lactic acid bacteria count and healthy pH levels in the gut. It contains the probiotic Saccharomyces boulardii which nourishes and supports healthy intestinal epithelium lining integrity, the front line for the bodys defense system; and a unique blend of Lactobacillus and Bifidobacterium probiotics which promote regular bowel function and support immune health. Primal Defense Ultra 90 capsules contains 5000 CFU of high potency probiotics per capsule compared to regular Primal Defense which contains 2000 CFU of probiotics per caplet. So you can take 1/2 the pills and achieve the same results! Probiotics are living microflora that play a critical role in maintaining g