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Microbiome

Probiotics

Live microorganisms studied for effects on the gut ecosystem. AgeBeacon tracks 500 registry-linked trials; 1 is directly aging-relevant and 14 are indirect. Evidence remains strain- and formulation-specific, with no direct healthy-aging efficacy result ready to score.

Why researchers are interested

Probiotics has become part of the longevity conversation because it sits at the boundary between an interesting biological idea and a much harder question: does that idea produce meaningful benefits in people? That gap between mechanism and real-world outcome is exactly where the evidence becomes most useful.

Researchers are not only asking whether Probiotics changes a laboratory marker. The more important questions are whether the effect is reproducible, whether it matters for function or age-related health, how large the benefit is, and what trade-offs or safety concerns appear with real use. Human trials can look very different from animal experiments or mechanistic studies, so AgeBeacon keeps those layers separate.

Below, we follow the evidence from human studies and reported outcomes through study quality, safety and remaining uncertainties. The aim is to show why Probiotics is being discussed, what has actually been observed, and what still needs to happen before an intriguing longevity hypothesis can become a dependable conclusion.

Where the science stands

This page summarizes the current human evidence captured in the Longevity Compass database. Result interpretation is conservative and unresolved outcomes remain unknown.

Research path

From biological idea to human evidence

These stages show different kinds of evidence for Probiotics. Moving through them does not mean an intervention is proven to slow aging.

  1. 1

    Biological idea

    Reviewing animal and laboratory research…

  2. 2

    Human testing

    1 direct aging trial links and 14 related trial links tracked. A trial count describes research activity, not benefit.

  3. 3

    What results show

    0 beneficial, 0 neutral and 0 harmful result links interpreted; 0 remain unresolved.

  4. 4

    Still unanswered

    Whether these findings translate into meaningful, lasting healthy-aging benefits in people remains unproven. Longer follow-up and clearer safety and clinical outcomes are needed.

How AgeBeacon evaluates evidence →

Beyond human trials

The bigger longevity story

Loading animal and laboratory evidence…

Animal and cell studies help explain biological plausibility and identify promising directions. They are shown separately and do not increase the human evidence-depth score.

Research depth

Human evidence picture

Evidence depth describes how much relevant human research exists; it is not an efficacy score. Unknown results are not treated as neutral.

1
Direct aging trials
14
Indirect relevant trials
0
Publications linked
0
Results publications

Interpreted results

Beneficial
0
Neutral
0
Harmful
0
Unknown / unresolved
0

Population relevance

Healthy / aging
0
Disease-specific
0

Safety evidence

0

Trials currently identified with safety-result data.

Go to the source

Studies & publications

Inspect the original evidence behind this profile. Links open the trial registry, PubMed or the publication DOI.

Frailty in Patients With Cirrhosis: Prognostic Value of the Phase Angle in Hospitalized Patients and Effect of Multifactorial InterventionNCT04243148INTERVENTIONAL · NA · 37 participants · COMPLETEDThe Effects of Microbiological Spectrum Changes to Improve Cognitive Health in Aging PopulationNCT05051501INTERVENTIONAL · PHASE2 · 90 participants · COMPLETEDEfficacy of a Probiotic Strain on Level of Markers of Inflammation in an Elderly PopulationNCT05529693INTERVENTIONAL · NA · 42 participants · COMPLETEDAssociations Between the Oral and Intestinal Microbiome and Neovascular Age-related Macular DegenerationNCT05604989INTERVENTIONAL · PHASE3 · 45 participants · COMPLETEDAnti-inflammatory Probiotics in Cognitive FunctioningNCT07165977INTERVENTIONAL · NA · 110 participants · ACTIVE_NOT_RECRUITINGImpact of PErioperative Nutrition Intervention on Bioimpedance Phase Angle (IPENIPA) In Breast Cancer PatientsNCT06890221INTERVENTIONAL · NA · 114 participants · RECRUITINGProbiotic on Psychological and Cognitive EffectsNCT03080818INTERVENTIONAL · NA · 200 participants · COMPLETEDEffect of a Probiotic on Diverticular SymptomsNCT02115867INTERVENTIONAL · PHASE3 · 143 participants · COMPLETEDStudy to Evaluate the Safety of Lactobacillus Rhamnosus GG ATCC 53103 (LGG) in Elderly SubjectsNCT01274598INTERVENTIONAL · PHASE1 · 15 participants · COMPLETEDProbiotic-Muscle StudyNCT04297111INTERVENTIONAL · NA · 12 participants · COMPLETEDNew E-Service for a Dietary Approach to the ElderlyNCT01179789INTERVENTIONAL · EARLY_PHASE1 · 48 participants · COMPLETEDEffects of Compound Probiotics-Polygonatum Sibiricum on Liver Health and Metabolism in Middle-aged and Elderly PeopleNCT06873412INTERVENTIONAL · NA · 84 participants · NOT_YET_RECRUITING

The big unanswered question

Can promising biology translate into meaningful healthy-aging benefits?

That is the standard this evidence profile is tracking. New trials and results can strengthen, weaken or change the picture over time.

Confidence: very-lowScore model: liveUpdated: 2026-09Source: live evidence database