Methodology
How Probiotics.info Organises and Presents Scientific Evidence
Probiotics.info is designed as a research-oriented encyclopedia of probiotic microorganisms, health conditions, scientific publications, and products containing identified probiotic organisms.
Our aim is to make scientific literature easier to explore without implying that a microorganism or commercial product has been proven to prevent, diagnose, treat, or cure a medical condition.
The website combines structured biomedical terminology, microorganism taxonomy, scientific publications, and product ingredient information into an interconnected research database.
- Biomedical terminology and conditions
Health conditions are organised using recognised biomedical terminology, including Medical Subject Headings (MeSH) where available.
MeSH is a controlled vocabulary used to organise biomedical concepts and scientific literature. On Probiotics.info, MeSH identifiers and scope notes may be used to help standardise condition names, definitions, synonyms, and relationships between concepts.
Not every biomedical concept in our underlying database is necessarily published as a public encyclopedia page. Public condition pages may be selected based on relevance, available evidence, editorial review, and suitability for the encyclopedia.
Condition definitions derived from structured biomedical terminology are intended to describe the condition itself. They should not be interpreted as medical advice.
- Microorganism taxonomy
Microorganisms are organised hierarchically where the available taxonomy allows it.
The structure may include:
Genus → Species → Subspecies → Strain
For example, a strain is treated as a more specific biological entity than the species to which it belongs.
This distinction is important because probiotic effects may be strain-specific. Evidence relating to one strain should not automatically be assumed to apply to every strain belonging to the same species.
Probiotics.info therefore attempts to preserve the most specific microorganism identification supported by the available information.
Historical names, abbreviated names, commercial naming conventions, and recognised aliases may be stored to help identify microorganisms across publications and product ingredient lists.
- Scientific publications
Scientific publications in the Probiotics.info research database are primarily organised around bibliographic information from biomedical literature sources such as PubMed.
Publication records may include information such as:
Title
Authors
Journal
Publication year
PubMed identifier
DOI
Study type
Study population
Microorganism names
Health conditions
Evidence-related metadata
The presence of a publication in the database does not mean that Probiotics.info endorses its conclusions.
Individual studies can differ substantially in design, quality, population, intervention, dosage, duration, comparator, outcome measure, and statistical power.
- Linking publications to conditions and microorganisms
Publications may be linked to conditions and microorganisms when the available article information indicates a meaningful relationship.
These links are used to build pages such as:
Conditions associated with research on particular microorganisms
Microorganisms appearing in research concerning particular conditions
Publication counts
Selected research papers
Research-topic summaries
A link means that the publication is relevant to both entities in the research database.
It does not necessarily mean:
That the microorganism improved the condition
That the study found a statistically significant benefit
That the effect was clinically meaningful
That the findings have been independently replicated
That the microorganism is appropriate for every individual
That a commercial product containing the microorganism has the same effect
Research associations should therefore be interpreted as a way to explore the scientific literature, not as treatment recommendations.
- Publication counts and evidence summaries
Some encyclopedia pages display publication counts, randomized controlled trial counts, systematic review counts, meta-analysis counts, or other research summaries.
These values describe the amount and type of research currently indexed in our database.
A larger number of publications does not automatically indicate stronger clinical evidence.
For example, twenty small or methodologically weak studies may provide less reliable evidence than a small number of well-designed trials.
For this reason, publication volume should not be interpreted as a measure of treatment effectiveness.
- Evidence scores and classifications
Probiotics.info may use structured evidence scores, confidence values, or classifications to organise research and prioritise relevant material.
These systems are intended to support navigation, ranking, and research discovery.
They are not clinical guidelines and should not be interpreted as formal medical recommendations.
Where automated classifications are used, they may consider information such as study design, article metadata, relevance, or other structured signals available in the database.
No automated score can fully capture the methodological quality or clinical significance of scientific research.
- Strain-specific evidence
Where a publication identifies a specific probiotic strain, Probiotics.info attempts to preserve that strain-level identification.
For example:
Lacticaseibacillus rhamnosus GG
is more specific than:
Lacticaseibacillus rhamnosus
When only the species can be identified, the database may classify the relationship at species level.
A species-level match should not be interpreted as evidence for every strain belonging to that species.
This distinction is also maintained when product ingredient lists are analysed.
- Product information
Products may appear on microorganism and condition pages when their published ingredient information contains microorganisms that can be matched to entities in the Probiotics.info taxonomy.
Product data may include:
Product name
Microorganism ingredients
Identified strain codes
CFU information where available
Product image
External product link
Affiliate information
Product information is based on available product listings and ingredient information and may change over time.
Manufacturers can reformulate products, alter strain composition, change dosage, update packaging, or discontinue products. Users should therefore verify current product information directly with the manufacturer or retailer.
- How products are linked to microorganism pages
A product may appear on a microorganism page when its ingredient information identifies that microorganism.
Where a specific strain is listed, the product may be associated with that strain.
Where only a species is listed, the product may instead be associated at species level.
The distinction is shown where possible so that users can see whether a match represents an exact strain or a broader taxonomic identification.
- How products are linked to condition pages
Products appearing on condition pages are connected indirectly through the research database.
The general structure is:
Condition → scientific publications → microorganisms → products containing those microorganisms
This means a product may be shown because it contains a microorganism that appears in research associated with the condition.
This does not mean that the commercial product itself:
Was used in those studies
Has been clinically tested for that condition
Has been demonstrated to be effective for that condition
Is recommended for treatment of that condition
Unless explicitly stated otherwise, research concerning a microorganism should not be treated as evidence for a particular commercial formulation containing that microorganism.
- Product inclusion is not endorsement
The presence of a product on Probiotics.info does not constitute an endorsement, ranking, medical recommendation, or claim of effectiveness.
Products are included to help users identify commercially available formulations containing microorganisms represented in the scientific database.
Commercial availability and scientific evidence are separate questions.
- Affiliate links
Some product links on Probiotics.info may be affiliate links.
This means Probiotics.info may receive a commission when a user purchases a product after following certain links.
Where applicable, affiliate relationships are disclosed.
Affiliate participation does not change the scientific meaning of a publication, condition–microorganism relationship, or taxonomy entry.
For more information, see our Affiliate Disclosure.
- Use of artificial intelligence
Artificial intelligence may be used to assist with parts of the research infrastructure, including tasks such as:
Extracting structured information
Identifying possible microorganism names
Organising publications
Generating summaries
Identifying possible relationships between entities
Assisting with classification and research discovery
AI-generated or AI-assisted information can contain errors.
For this reason, automated output should be understood as research assistance rather than an authoritative scientific or medical conclusion.
Where possible, the underlying publication, taxonomy record, or source data should remain the primary reference.
- Automated microorganism matching
Product ingredient lists and scientific text may be processed using structured microorganism names, strain codes, aliases, and taxonomic relationships.
The matching system attempts to distinguish between:
Genus
Species
Subspecies
Strain
and to avoid treating a broader taxonomic match as an exact strain match.
Nevertheless, biological nomenclature can be complex. Names can change, historical classifications may remain in use, manufacturers may use abbreviated terminology, and strain identifiers can vary in formatting.
Occasional classification errors are therefore possible.
- Scientific uncertainty
Biomedical research is continuously evolving.
Findings may later be:
Replicated
Contradicted
Refined
Reclassified
Superseded by larger studies
Interpreted differently in systematic reviews or clinical guidelines
Probiotics.info should therefore be viewed as a research-navigation resource rather than a final statement of scientific consensus.
Where clinical decisions are involved, current professional guidelines and qualified healthcare advice should take precedence.
- Editorial review and corrections
We aim to improve the accuracy of taxonomy, publication links, condition classifications, and product information over time.
Corrections may be made when:
Microorganism taxonomy changes
A strain has been incorrectly identified
A publication has been linked to the wrong entity
Product ingredient information changes
Better source information becomes available
Automated processing produces an incorrect result
Users, researchers, manufacturers, and healthcare professionals are encouraged to report possible errors.
Corrections should be evaluated on the basis of reliable source information rather than commercial preference.
- What Probiotics.info does not do
Probiotics.info does not attempt to replace:
Medical diagnosis
Clinical guidelines
Healthcare professionals
Pharmacist advice
Regulatory authorities
Manufacturer safety information
Full critical appraisal of every scientific publication
The encyclopedia is intended to help users navigate research and understand how microorganisms, conditions, publications, and products relate within the database.
- Interpretation of the encyclopedia
The safest way to interpret the site is:
“This microorganism has been studied in research concerning this condition.”
rather than:
“This microorganism treats this condition.”
Similarly:
“This product contains a microorganism represented in research associated with this condition.”
should not be interpreted as:
“This product has been proven to treat this condition.”
Maintaining that distinction is central to the methodology of Probiotics.info.
Questions or corrections
Questions about our methodology, scientific classifications, product matching, or possible errors can be submitted through our contact or corrections page.
We welcome evidence-based corrections that help improve the accuracy and usefulness of the encyclopedia.