title: Probiotics revisited.
mesh_terms: D000818:Animals; D019587:Dietary Supplements; D005767:Gastrointestinal Diseases / Q000188:drug therapy / Q000382:microbiology; D041981:Gastrointestinal Tract / Q000187:drug effects / Q000382:microbiology; D006801:Humans; D007778:Lactobacillus / Q000187:drug effects / Q000502:physiology; D019936:Probiotics / Q000494:pharmacology* / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic