In any case, there is no doubt that there is a large probiotic bacteria count in kefir. Just how much on average, is still being researched. The most likely scenario is that it ranges from several hundred billion to trillions per cup. If you know of more studies, please do let us know. References:
https://www.yemoos.com/blogs/yemoos-blog/how-many-probiotics-or-cfu-does-kefir-really-have



