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Tier-CPublic-ready6/12/2026

Prebiotics

Glucose and metabolic health markers is closer to a research marker, so it should be read separately from a directly felt benefit.

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

Papers analyzed
20
Caution signal
Low
Representative score
40.5
Glucose and metabolic health markersDigestion and gut comfortOther measured outcomes

Main benefit evidence

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

Glucose and metabolic health
2 studiesTier-C
Glucose and metabolic health markers
Some positive signal observedResearch 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
37.4
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Digestion and gut health
1 studiesTier-C
Digestion and gut comfort
Some positive signal observedFelt benefit focusPatient-group study
Potential benefit studied in Digestion and gut health.
Open metrics
>
Digestion and gut comfort
No direct rate reported. Read direction and evidence strength together.
Evidence score
20.9
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Other research signals
1 studiesTier-C
Other measured outcomes
Some positive signal observedFelt benefit focusSupplement context
Potential benefit studied in Other research signals.
Open metrics
>
Other measured outcomes
No direct rate reported. Read direction and evidence strength together.
Evidence score
20.9
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Nutrient status
2 studiesTier-C
Nutrient status markers
Signal is still limitedResearch 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
>
Nutrient status and deficiency markers
No direct rate reported. Read direction and evidence strength together.
Evidence score
7.8
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Condition-specific evidence
2 studiesTier-C
Condition-specific health context in a specific context
Signal is still limitedResearch marker focusSupplement context
This result was studied for Condition-specific health context in a narrower population or condition-specific context. It should not be generalized as an everyday supplement effect.
Closer to a research marker than a directly felt benefit.
Open metrics
>
Condition-specific health context
No direct rate reported. Read direction and evidence strength together.
Evidence score
5.9
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
0.0
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: 426
observational

Overall, 8 weeks of probiotic supplements to subjects with MDD resulted in an improvement in BDI score compared with placebo whereas no significant effect of prebiotic supplementation was seen.

Key Evidence #2
Public scholarly dataCitation signal: 206
review

It was shown that the gut microbiome has an impact on nutrient metabolism and energy expenditure, and supplementation with probiotics, prebiotics, and synbiotics may alter the secretion of hormones, neurotransmitters, and inflammatory factors, thus preventing

Key Evidence #3
Public scholarly dataCitation signal: 197
review

Current views on the effects of pro- and prebiotics on the intestinal epithelial barrier as well as on non-epithelial cell barrier constituents, such as the enteric glial cell network are summarized.

3 more summariesLimited representative sample by study type.
>
Public scholarly dataCitation signal: 197
review

This study summarizes the recent works on prebiotics, probiotics, synbiotics (products merging pre- and probiotics), paraprobiotics and postbiotics in IBD.

Public scholarly dataCitation signal: 191
observational

Dietary supplementation with a prebiotic oligosaccharide mixture results in improvement of the gut microbiota composition, reduction of sCD14, CD4+ T-cell activation (CD25), and improved NK cell activity in HAART-naive HIV-infected individuals.

Public scholarly dataCitation signal: 187
observational

WAO recommendations about prebiotic supplementation for the prevention of allergy are intended to support parents, clinicians and other health care professionals in their decisions whether or not to use prebiotics for the purpose of preventing allergies in hea

Prebiotics
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