All of the bacterium that are called "probiotic" are originally soil-based bacterium.
There are approximately 40,000 different TYPES of bacteria in a teaspoon of soil.
Now, some of them should be in the human body and of course some not.
The first step in culling out the bacterium that we as human animals need is the plant and animal world. Just about every culture and civilization has derived bacterium from animals-- whether directly through animal husbandry or , for instance, in the case some Native Americans, eating the intestines of bison directly after a kill. Most likely, when I can get the raw milk that I should be able to soon, I will take the milk from the healthy animal and culture it simply by heating to 110-115, without the additon of anything. Now, this animal will have to be a grazing animal, and most likely the best bacteria will come in the fall after plenty of grass grazing.
When I start making sauerkraut, should I choose to do it the completely "natural" way, I will put the cabbage in the brine (inhibiting bad bacteria) and wait for the natural lactobacillus that are in the cabbage to start breeding. At this first stage all sorts of bacteria will be breeding (even with the brine) and this is why some culturings fail. In a successful culturing the lactobacillus will take over in time, becoming the predominant bacterium and resulting in a good, tasty sauerkraut. To ensure success I will separate out the whey from my yogurt and add it to the cabbage FROM THE BEGINNING to give the inherent lactobacillus a head start.
What are called "Probiotics" have all been derived from humans--- these are the sources. Thus, they have survived the high-acid stomach conditions.
Without any specific names--- actual scientific names-- I view these HSOs with a great degree of scepticism.
It was the same with KEFIR--- they always compare themselves with "Probiotics"-- claiming greater everything, yet there are never enough details to distinguish them in any meaningful way from "Probiotics."
If someone actually takes these HSOs and reports even feeling "better", as I have with my experience, then I'd be more curious.
So far, everything I've seen claimed about "HSO"s here, can also be said for what are called "Probiotics"---- everything.
So far, HSOs are simply a marketing gimmick.
EBM, just a quick question, have you done any culturing yet for your family?
You're lookin' for me, ya found me (sure, the "Superior" probiotic),