One thing to be aware of is that many commercially available fermented foods (especially vegetables) have undergone pasteurization, which kills the beneficial b

One thing to be aware of is that many commercially available fermented foods (especially vegetables) have undergone pasteurization, which kills the beneficial bacteria. I've found that the refrigerated section of my local Whole Foods is the best source of unpasteurized kimchi, sauerkraut, and pickles. (Also check out the vinegar section, where you can usually find unpasteurized apple cider vinegar.) Look for the words "probiotic" or "unpasteurized" on the label; if a product doesn't have either of those words, chances are it contains no active cultures.