With probiotics, how many CFUs should I look for as the dose? Is more necessarily better?
As a general rule, a probiotic should provide at least 1 billion CFUs (colony forming units, i.e., viable cells), with doses typically ranging between 1 billion and 10 billion CFUs daily for adults. This is explained in the Probiotic Supplements Review
, which includes ConsumerLab.com's tests of popular probiotics. There are some exceptions to this: Doses as high as 100 billion CFUs or more are used in some situations, while doses for children and infants are sometimes below 1 billion.
The specific dose will depend on the probiotic strain and the purpose for which it is taken. You can look this up in the "What to Consider When Using
" section of the Review, where you will find the dose and strain(s) used in preventing/treating antibiotic-associated diarrhea, IBS, anxiety, depression, allergies, and more. Details about the actual studies are found in the "What It Does
" section of the Review.
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This CL Answer initially posted on 4/9/2016.
Last updated 8/2/2017.