Kefir has three times the amount of probiotics as yogurt, with 12 active probiotic strains and 15 to 20 billion colony-forming units (CFUs). The identification of microbiota present in kefir and its grains is important as it directly impacts the quality of the probiotic product.
https://trudtox.com/what-is-the-probiotic-content-of-kefir.html

