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Bifidobacterium

Bifidobacterium

Best for

Reduce diarrhea and recover faster

Large effect, needs confirmation for 12 weeks · 1 study , n=56

3 papers · 4 claims · 5 outcomes scored · 4 positive

Outcomes

What bifidobacterium actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect Evidence Dose Weeks Rank
Ease irritable bowel symptoms Large effect, needs confirmation
large 		1 RCT n=79 — 12 wk #4/11
Reduce diarrhea and recover faster Large effect, needs confirmation
large 		1 RCT n=56 — 12 wk #9/17
Build a more diverse microbiome Large effect, needs confirmation
large 		1 RCT n=56 — 12 wk #1/10
Grow beneficial gut bacteria Promising early signal
moderate 		1 RCT n=46 8 g 4 wk #5/14

Risk profile

Adverse events and known drug interactions

Safety events

vomiting
rash

Sources

  1. 1. Inulin-type fructans and 2'fucosyllactose alter both microbial composition and appear to alleviate stress-induced mood state in a working population compared to placebo (maltodextrin): the EFFICAD Trial, a randomized, controlled trial. (2023) ↑
  2. 2. The Efficacy and Safety of Single-Strain Probiotic Formulations Containing Bifidobacterium lactis or Bacillus coagulans in Adult Patients with Irritable Bowel Syndrome-A Randomized Double-Blind Placebo-Controlled Three-Arm Interventional Trial. (2023) ↑
  3. 3. The Efficacy of Probiotics, Prebiotic Inulin-Type Fructans, and Synbiotics in Human Ulcerative Colitis: A Systematic Review and Meta-Analysis. (2019) ↑

Generated August 14, 2026

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