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Tier-CPublic-ready6/12/2026

Probiotics

Stress Response and Sleep Changes is the main area connected here, and any felt benefit should be read together with the human evidence base.

Representative tier calculated from paper evidence that passed the collection audit.

Papers analyzed
20
Caution signal
Low
Representative score
45.1
Stress Response and Sleep ChangesGlucose and metabolic health markersMenstrual and women's health

Main benefit evidence

The representative ingredient tier is calculated from these target-level evidence groups.

Stress and mood
2 studiesTier-B
Stress Response and Sleep Changes
Fairly consistent positive signal in studiesFelt benefit focusSupplement context
These findings come from stress response, cortisol, anxiety, or sleep outcomes. They may mix felt benefits with physiological markers.
Open metrics
>
Stress and mood balance
No direct rate reported. Read direction and evidence strength together.
Evidence score
51.9
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Glucose and metabolic health
2 studiesTier-C
Glucose and metabolic health markers
Fairly consistent positive signal in studiesResearch marker focusPatient-group study
This card is closer to a measured biomarker or lab outcome than a directly felt user benefit.
Closer to a research marker than a directly felt benefit.
Open metrics
>
Glucose and metabolic markers
No direct rate reported. Read direction and evidence strength together.
Evidence score
47.5
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Women's health
1 studiesTier-C
Menstrual and women's health
Some positive signal observedFelt benefit focusPatient-group study
Potential benefit studied in Women's health.
Open metrics
>
Menstrual and women's health
No direct rate reported. Read direction and evidence strength together.
Evidence score
44.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Cognition and focus
2 studiesTier-C
Cognition, memory, and focus
Some positive signal observedFelt benefit focusPatient-group study
Potential benefit studied in Cognition and focus.
Open metrics
>
Cognition, memory, and focus
No direct rate reported. Read direction and evidence strength together.
Evidence score
39.2
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Animal or cell research
1 studiesTier-C
Animal or Cell-Study Clue
Some positive signal observedResearch marker focusSupplement context
This is an early research clue, not direct human supplement-effect evidence.
Closer to a research marker than a directly felt benefit.
Animal or cell-study clue — not a human effect probability.
Open metrics
>
Animal, cell, or mechanism-only findings
No effect-rate metric is shown because this should be read as research context, not as a general supplement effect.
Evidence score
27.5
Score reflects signal strength. Tier also considers paper count, repetition, and study context.

Research clues (read separately)

Disease-specific, biomarker, animal, or cell-study findings — not everyday felt benefits.

Specialized clinical context
1 studiesTier-C
Specialized Treatment-Setting Signal
Some positive signal observedDisease markerSpecialized treatment
This evidence comes from contexts such as cancer, mortality, hospitalization, drug combination, or radiation studies. It should not be read as a general supplement effect.
Closer to a research marker than a directly felt benefit.
Open metrics
>
Menstrual and women's health
No direct rate reported. Read direction and evidence strength together.
Evidence score
35.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.

Recent research

Updated This Month10 new papers

10 new papers were added in this period. No new risk signal was identified.

What's new

10 new papers were added.No new risk signal was identified.

Most notable recent finding

This is the most meaningful new study in the latest update.
review
Why it mattersIt ranked highest among the newly collected papers for this ingredient in the latest update.
View paper

Key cautions to review

Standalone side-effect signals and combination cautions are listed separately.

Caution index
0.5
Caution band: Low
Caution signals
0
Side effects + combos + curated rules
Key precautions
No combination caution signal is clear enough to show right now. This does not guarantee safety.
Standalone side effects, combination cautions, and positive combos are separated below.

Side-effect and combination signals

No standalone side-effect or combination signal is currently clear enough to show from the collected papers. This does not mean there is no concern.

Evidence summaries

Paper IDs and full lists are private. Only study types and summaries are shown.

Key Evidence #1
Public scholarly dataCitation signal: 807
observational

It is demonstrated that probiotic consumption for 12 weeks positively affects cognitive function and some metabolic statuses in the AD patients and no considerable effect on other biomarkers of oxidative stress and inflammation, fasting plasma glucose, and oth

Key Evidence #2
Public scholarly dataCitation signal: 778
review

This study aims to underline the possible beneficial impact of probiotics for human health and medical sectors and for better lifestyle.

Key Evidence #3
Public scholarly dataCitation signal: 641
observational

Results provide the first evidence that the intake of probiotics may help reduce negative thoughts associated with sad mood, as well as a potential preventive strategy for depression.

3 more summariesLimited representative sample by study type.
>
Public scholarly dataCitation signal: 449
observational

Evidence supporting health-promoting properties of probiotics as a part of healthy diet in the older adults is provided, including improvements in mental flexibility test and stress score and changes in gut microbiota.

Public scholarly dataCitation signal: 248
observational

Probiotics + FOS intervention can modulate gut microbiota, SCFAs and serotonin in association with improved ASD symptoms, including a hyper-serotonergic state and dopamine metabolism disorder.

Public scholarly dataCitation signal: 213
review

Meta-analysis and meta-analysis showed that probiotics may reduce the risk of NEC and mortality and morbidity in very preterm or very low birth weight infants, and evidence was assessed as moderate certainty for both these outcomes because of the limitations i

Probiotics
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