What do systematic reviews say?

Probiotics vs control

Probiotics may leads to lower incidence AAD: complete case compared with control (low certainty).

• Probiotics for the prevention of Clostridium difficile‐associated diarrhea in adults and children 2017 · Cochrane Headline outcomes only
  RR 0.58 [0.48, 0.7]
  33 studies · 8870 participants
  Low