Think about the use of ‘anti-biotics’ in beef and daiy cows. A lot of that comes to us.
The best ‘pro-biotic’ I’ve found for me is Yogurt from raw milk.
An amazing side effect is my allergies have all but disppeared.
Yep. I've read stories about reductions of allergies... even milk allergies, because of such products.
We don't have a lot of access to raw milk around here, but the yogurt you spoke of and keifer sound very similar. What I use is just a freeze-dried & reconstituted version of the little 'grains' that are produced in fermented milk.