CFU's will not pertain to Belly Mend as the probiotics in these products do not "colonize" like a traditional probiotic. CFU represents Colony Forming Units and estimates the number of viable bacteria per gram if it is a powder (CFU/g) or per milliliter if it is a liquid (CFU/ml). Belly Mend contains probiotic lysates which include 11-strains of probiotics that have been put through our proprietary micronization process. It improves gut immunity by 55%, decreases leaky gut by 27%, and supports a healthy gut microbiome.