Can products containing live bacteria that have not been tested in human studies still be effective?
Some companies know very little about the specific health effects of the bacteria they are selling. These products should not be called probiotics. Scientific studies are expensive to conduct, and many companies have not sponsored them. If studies have not been conducted on a strain, it is impossible to know for certain if the strain can survive and function as a probiotic in the human body. An undocumented strain might be effective. But such a product cannot be strongly recommended. It is best to purchase a product made by a trustworthy company that can provide documentation of the health effects you are looking for.
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