In a message dated 11/16/2010 9:10:26 A.M. Pacific Standard Time,  
[email protected] writes:

Alas,  remember that any store bought kefir will undoubtedly be pasteurized
--  which in essence (in my opinion) kills just about every healthy thing  
it



I add probiotics back in pasteurized products. I learned when making wine  
one procedure said to kill the yeasts then add back good yeasts or else some 
bad  ones could dominate and wreck the wine. I make my own sauerkraut and 
have to can  it in order for it to keep longer than a week. Canning kills the 
yeasts. I even  add probiotics to ACV instead of paying 500% more for u
npasteurized  versions.
Brickey