I started out with Webber then Jamieson when I was on a long course of antibiotics for sinus issues in 2000.
I soon seriously switched to Natural Factors Protec capsules or a few years.
Then switched to what's in my signature...Renew Life Ultra Flora Critical Care (50 billion).
As well as Primadophilus Reuteri capsules.
I do add one of the Costco Multi probiotic most nights...just because we have them.
All taken at bedtime about an hour after my meds/supplements.
I now give my cat the New Roots Max probiotic powder each feeding.