[MrDresden]

I ferment my own sauerkraut and kimchi for instance (most store bought brands do not have active cultures due to risk of the containers exploding).

Greek yogurt with active cultures and sour milk with lactobacillus acidophilus and bifidobacterium lactis. Unripened bananas.

Some whole grains; rye and sourdough breads, whole grain oats.

I also stay away from fast food or anything deep fried, avoid most processed foods and rather do home cooked meals each day.

This isn't probiotic, but I've noticed that my system is much happier with fish than red meat. So there is plenty of that each week.