Low-sugar fermented foods include refrigerated kimchi, sauerkraut, kombucha, kefir, and low-sugar yogurts.

“These would be things like kimchi, sauerkraut. Again, low sugar. Look at the labels. This is the stuff that would need to be refrigerated. We're not talking about pickles kept on the non-refrigerated shelf, in the non-refrigerated section of the grocery store, but rather the brine and the pickles that don't have a ton of sugar, so the sour pickles that is, that are kept in the refrigerator. Things like kimchi, things like kombucha; keep in mind, some kombucha has alcohol, so keep that in mind if you're giving this to kids, who shouldn't be ingesting alcohol. Many adults probably shouldn't be ingesting alcohol. Kombucha contains some alcohol. Things like kefir, quality yogurts, low sugar yogurts.”