Improvement after a supplement is not the same as a comparative result
Start with the comparison. A before-and-after change alone cannot isolate the contribution of an ingredient.
Probiotics
Selected research topic
Immune and respiratory health
Confirmed comparison evidence for this topic is limited. The findings below retain their study conditions.
Some publications still need interpretation checks and are kept separate from the findings below.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 5
- Human comparison publications
- 0
- Publications needing review
- 3
Findings in the studies
Incidence of oral and respiratory tract infections
Other human research, including observational studies and reviews
- A change was reported, but the comparison could not be confirmed.Patient group
Measurement and study conditions
- Study type
- Randomized controlled trial: subjects were randomly assigned to groups for comparison.
- Study population
- Human participants · Patient group
- Ingredients tested
- Unknown intervention
- Measurement time
- Not confirmed.
meningitis and bacteremia
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.Patient group
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · Patient group
- Ingredients tested
- Unknown intervention
- How results were compared
- Comparison unclear · Study comparison: Selected case series of infection after probiotic use; no control group
- Additional measurement information
- Secondary outcome
- Measurement time
- 10 to 22 days of antimicrobial treatment
This result is held for interpretation. That does not mean research found no effect.
Outcome groups needing additional review (2)
- immunity in older adults · Distinct papers needing additional review: 1Evidence criteria check: 1
- incidence of reinfections · Distinct papers needing additional review: 1Evidence criteria check: 1
One paper can appear under multiple measured outcomes or review reasons, so these counts should not be added together.
Representative outcome and study details
Human studies reported a change with no confirmed comparison group in Incidence of oral and respiratory tract infections.
Scope not specified · Human studies · Includes patient groups · comparator not confirmed
1 publications linked to this result
- Route, form, dose, or population details are incomplete, so the findings cannot be confirmed as directly comparable.
Data coverage and detailed study classifications
Paper counts are separated by research topic below. One paper may contribute to multiple findings.
Analysis status: Public-ready
Ingredient analysis date:
How the grade was determined: B
The 60.0 evidence score includes 1 independent human studies and 1 clinical studies in the representative benefit area. The B tier remains conservative because of limited repetition across independent human clinical studies, too few clinical findings with an explicit effect direction.
The grade is based mainly on the research area with the most evidence. It does not mean the same result was found in other areas.
Papers linked to this ingredient overall: 110
Papers linked to this topic 5 · distinct papers 5 · comparison findings need further review · papers needing additional review 3
A publication may appear in more than one count. These numbers should not be added. Ingredient-wide papers, topic-linked papers, and sources in outcome groups use different scopes. Adding source counts may count the same paper more than once.
- immunity in older adults: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Incidence of oral and respiratory tract infections: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- incidence of reinfections: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- meningitis and bacteremia: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
meningitis and bacteremia
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Unknown intervention · Patient group
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Incidence of oral and respiratory tract infections
A change was reported, but the comparison could not be confirmed.
Controlled study in people · Unknown intervention · Patient group
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
immunity in older adults
The study needs further checking before its result can be interpreted.
Review · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
incidence of reinfections
The study needs further checking before its result can be interpreted.
Review · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Meta-analysis · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
How to read research findings
How should I read research findings?
Research guidesNo clear difference and an uninterpretable result are different
A reported null comparison contains a result. An abstract without an interpretable comparison leaves a question unresolved.
Paper counts and study counts are different
Count original research separately from research that reanalyzes it. Publication volume is neither replication nor a quality rating.
Side effects and combination findings
Findings from this ingredient alone are shown separately from those involving another supplement or medication.
No reviewed caution rules are available yet. Reported caution findings are shown below.
Review 1 combination findings and 0 findings that outperformed an ingredient alone.
Findings to review with care
Side effects reported for the ingredient alone are separated from findings involving another supplement or medication.
Side effects reported with this ingredient alone
Symptoms or adverse events reported in studies without another active ingredient.
side effect incidence1 papers
Probiotic supplementation during H. pylori antibiotic therapy may reduce overall side effect incidence compared to control (RR 0.735, 95% CI 0.598–0.902), though this benefit was only confirmed in non‑blinded trials.Human studies · Meta-analysisReported improvements with combinations
Combination findings are grouped by how the study compared them. This is not a recommendation to combine ingredients.
Combinations with reported improvement
The combination showed improvement, but each ingredient's contribution is unclear.
셀레늄Co-supplementation with probiotics and selenium resulted in significant improvements in mental health, hormonal profiles, and oxidative stress markers compared to placebo.