Yes, you can add probiotic powder to milk when making homemade yogurt or kefir or sour milk.
Just open a capsule into milk.
You can combine different probiotics from different producers.
You can also use liquid probiotics.
You can use any source of bacteria, be it some other yogurt, some other kefir, powder from probiotics capsules, powder yogurt starter, or any mix of the above.
You can use yogurt from today as a starter for yogurt of tomorrow, but after 48 hours you may need a new starter, as there are many bacteria in the air that overtake the fermentation process, if you try to always use the same yogurt.
Bacteria will actually multiply million times when milk is exposed to the human body temperature, all within 24 hours, and from one expensive capsule of probiotics, you could get one liter of yogurt, containing as many live bacteria as one million capsules of probiotics.
Which one is more potent, do you think?
Drinking one capsule of probiotics or drinking one cup of yogurt containing hundreds of thousands more live bacteria than the capsule?
And, if you really want it to reach your colon, you can take it as enema.
Yogurt enema have been of great help to some people.
If you are allergic to milk, this will probably not work as a remedy.
If you are lactose intolerant, this may work, cause yogurt bacteria actually converts all lactose in milk into acids, making yogurt naturally lactose free.
The best is if you can visit a local farm and get raw milk.
It already contains natural fermenting bacteria, and all you need is yogurt maker or something that can keep your milk at constant warm temperature.
WS