Probiotics
surging probiotics — marketing outpaces the strain-specific evidence
Evidence by outcome
gut / digestiongrade Bmoderate certainty— benefits are strain- and condition-specific (e.g. some IBS, antibiotic-associated diarrhea)
gut / digestiongrade Bmoderate certainty— reduces antibiotic-associated diarrhea and helps some IBS symptoms (strain-specific)
moodgrade Clow certainty— small effects on mood/anxiety in some "psychobiotic" trials; strain-specific, heterogeneous
People say · Evidence shows
“Probiotics fix any gut problem”
aheadlargemarketing claim
Compare
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sources: PMID:00000025 · PMID:20000110 · PMID:42221774