Probiotic effects are strain-specific. Generic 'probiotic' doesn't mean much, the evidence accumulates around specific strains tested for specific conditions.
Probiotic supplementation reduced antibiotic-associated diarrhea risk by 60% (RR 0.40). Strongest evidence: Lactobacillus rhamnosus GG and Saccharomyces boulardii.
Probiotics significantly improved global IBS symptoms vs placebo (RR 0.79). Bifidobacterium infantis 35624 had the strongest single-strain evidence.
Probiotic supplementation produced small but significant improvements in depression and anxiety scores (SMD -0.13 and -0.31).
We prioritize randomised controlled trials and meta-analyses over single observational studies. Animal and in-vitro data are listed as "mechanistic", they suggest direction, not human effect size.
We don't cherry-pick favourable studies, omit conflicting evidence, or cite industry-funded trials without flagging the conflict of interest where known.
The research is one thing, what to take, at what dose, paired with what, is another. We compose stacks that turn the evidence into a daily routine.
Studies referenced are real published research. Summaries are paraphrased for accessibility, for exact methods and full text, click through to PubMed. Educational use only, not medical advice. Consult a qualified clinician before starting any new supplement.