Many, many references state that kefir has at least 3 strains of candida, but I can't find any references proving that they are beneficial and not just benign - still researching this. It's not the probiotic bacteria that colonize but specifically the yeast. My point is that if candida albicans and tropicalis and 76 other known candida strains can populate the entire human intestinal tract, why would you say that these forms of candida couldn't? That doesn't seem like a logical conclusion to me, and one not based on science. Are you using anecdotal accounts of people claiming that kefir didn't "work" for them to come to this conclusion?
Strains of bacteria and yeast found in Kefir Grains (and kefir itself):
Water kefir is typically composed of Lactobacillus, Streptococcus, Pediococcus and Leuconostoc
bacteria with yeasts from Saccharomyces, Candida, Kloeckera and possibly other minor yeasts.
L. casei subsp. casei
L. casei subsp. pseudoplantarum
L. casei subsp. rhamnosus
L. casei subsp. tolerans
L. coryneformis subsp. torquens
*does not contain C. albicans - the yeast associated with human yeast infections and 'candida' in
*does not contain T. glabrata, also associated with yeast infections and 'candida'
The above research is largely from the work of Dolores Sanchez-Penalver, Aidoo, Dominic
Anfiteatro, and Ronald S. Brown, with additional resources from Abosluteastronomy Encyclopedia