"Yogurt works, but plain yogurt tastes awful without a whole lot of sugar which seems to defeat the purpose. I’ve never tried kefir or kombucha -what do you do with it? What else is there?"
I only eat yogurt plain and unsweetened. Maybe try some different brands? They aren't all alike. Costco sells Bellewether plain yogurt and I think it is especially yummy.
Kefir is just liquid yogurt. I drink straight kombucha only rarely. I usually put the ginger-lemon kombucha from Costco in my pomegranate lemonade to zing it up a bit.
Costco also has dried apricots with probiotics in them now. Mr Pique bought it and they are good!
I loves me a good dill pickle, but other than that I don't go in much for fermented foods except in very small doses.