Probiotics are not for everyone. I ended up in the E.R. from taking just one cup of Kefir and a serving of Yakult. Whether it is "die off" or not, three weeks later, and I feel like the bottom of my stomach is going to fall out.
While most people have no problems with probiotics, some people like myself, have adverse reactions to the cultures in these fermented products. The E.R. doctor says he sees a lot of people coming in doing detox diets and that these products are not regulated as to how much bacteria is put in. Apparently, the bacteria in these products did not mix with my system, and I am still feeling the aftermath.