How to Check If a Mushroom Research Paper Was Corrected or Retracted
Last reviewed September 11, 2026, by the MushroomHealthBenefits.com Research & Editorial Team.
Mushroom research retractions and corrections happen after a paper is already published, and PubMed links each one back to the original article. This guide walks through the exact steps to check whether a specific mushroom study has been corrected, questioned, or fully withdrawn before you cite it or rely on it.
This is a verification skill, not a judgment about any particular mushroom or supplement. The same steps work whether the paper is about lion’s mane, reishi, cordyceps, or any other species.
Why a Paper’s Publication Status Matters
PubMed, maintained by the U.S. National Library of Medicine (NLM), links citations for original articles to citations for retraction notices, correction notices (called “errata”), and expressions of concern. This lets readers trace what happened to a paper after it was published. A study that looked solid the day it was indexed can later be corrected in a minor way, questioned by the journal’s editor, or withdrawn entirely. If you want to understand how strong a piece of evidence is in the first place, our guide to reading mushroom research covers that step; this guide covers the separate question of whether that evidence has since changed status.
Myth vs. Reality: Publication Status
- Myth: If a paper shows up in a PubMed search, it is automatically still valid and unquestioned.
Reality: PubMed indexes retracted papers alongside valid ones. NLM assigns a “Retracted Publication” label to the article and links it to the retraction notice, but the original citation still appears in ordinary search results. - Myth: A “correction” or “erratum” means the whole study is invalid.
Reality: NLM treats corrections, corrigenda, addenda, and small partial fixes (such as a mislabeled table or image) uniformly as “errata.” An erratum updates or clarifies part of a paper; it does not by itself mean the conclusions were withdrawn. - Myth: A retraction and an “expression of concern” are the same thing.
Reality: An expression of concern is published by a journal editor while an investigation is still underway. It signals an open question, not a final outcome. A retraction is the outcome: a formal statement that the article is being withdrawn in whole. - Myth: Once you find one citation for a study, you have the full picture.
Reality: The full picture can be split across two linked citations — the original article and a separate citation for the notice. You need to open both.
How Do You Check a Paper’s Status on PubMed?
Use these steps for any specific mushroom-research paper you want to check or cite.
- Open the paper’s PubMed record. Search for the paper by title or author on PubMed and open its full citation page.
- Look for a linked notice on the citation itself. NLM’s linking system adds specific phrases to the citation text: “Retraction in: [article title]” if the paper has been retracted, “Erratum in: [article title]” if a correction was published, or “Expression of concern in: [article title]” if an editor has raised an open question.
- Open the linked notice, not just the original paper. Each phrase links to a separate citation for the notice, which usually explains, in the journal’s own words, what changed and why.
- Read the notice’s stated reason. NLM does not distinguish between a retraction issued for an honest error and one issued for research misconduct — both use the same “Retraction Notice” label. You have to read the actual notice to know which kind you’re looking at.
- Check whether the notice covers the whole paper or one part of it. An erratum for a single graph, table, or statement does not necessarily undercut the rest of the article. A full retraction does.
- Note the date of the notice. A notice published years after the original paper means the paper may have circulated, and still be cited elsewhere, without the correction attached.
What the Different Notice Types Mean
These are the specific categories NLM uses to link citations in PubMed:
- Erratum: A correction, corrigendum, addendum, or partial fix to something in the original article. NLM requires the erratum to be published on a numbered page or with identifiable online pagination in a later issue of the same journal.
- Retraction notice: A formal statement that the article is being withdrawn in whole. It must come from an author (or their legal counsel), the department head or lab director where the work was produced, or the journal editor, and it must be published in citable form.
- Expression of concern: A notice, usually written by a journal editor, flagging an open question about a paper’s integrity while an investigation is underway. It does not confirm a problem — it signals that one is being looked into. The outcome may later become a retraction, a correction, or no further action at all.
- Comment: A separate article, letter, or editorial that challenges, supports, or expands on the original paper. A comment is not a correction notice, but a linked comment can be a sign that other researchers found something in the paper worth responding to.
Limits of This Verification Method
Checking PubMed’s linked citations is useful, but it is not a commitment. Indexing takes time, so a notice published very recently may not yet be linked when you check. A paper can also be discussed, questioned, or corrected in ways that never reach PubMed’s formal linking system at all. Treat a clean PubMed check as a reasonable step, not a final verdict, and recheck a paper’s status periodically if you plan to keep citing it. If you’re also weighing how much a paper’s findings should count as evidence in the first place, pair this check with our evidence grading and source policy.
A Practical Verification Worksheet
Fill this in for any mushroom-research paper before you rely on it or cite it elsewhere:
- Paper title and PubMed ID (PMID): _____________
- Does the citation page show a linked notice (Retraction in / Erratum in / Expression of concern in)? Yes / No
- If yes, which type, and what date was the notice published? _____________
- Does the notice cover the whole paper or one specific part (a table, figure, or statement)? _____________
- What reason does the notice give, in the journal’s own words? _____________
- Based on the notice, is this paper still usable as evidence, usable with a caveat, or not usable at all? _____________
- Date you checked: _____________
When to Replace a Source
If a paper carries a full retraction notice, do not cite it as evidence, even indirectly, unless you are specifically discussing the retraction itself. If it carries an erratum for a detail unrelated to the point you’re citing, you can generally still use it, but note the correction if it’s relevant to your claim. If it carries an expression of concern, treat it as an open question rather than settled evidence until the investigation concludes, since the outcome isn’t known yet at that stage.
Frequently Asked Questions
Does a correction mean a mushroom study is invalid?
Not necessarily. NLM classifies minor fixes — a corrected table, image, or single statement — as “errata,” which update or clarify part of a paper without withdrawing its conclusions. Read the specific correction to see whether it touches the finding you’re relying on.
How do I know if a mushroom study has been retracted?
Open the paper’s PubMed citation and look for the phrase “Retraction in: [article title].” That phrase links to a separate notice explaining the retraction. If the citation doesn’t show that phrase, no retraction has been linked to it on PubMed.
What’s the difference between a retraction and an expression of concern?
An expression of concern is published while a journal is still investigating a paper — it flags an open question, not a conclusion. A retraction is the conclusion: a formal statement that the paper is being withdrawn in whole.
Can a retracted mushroom study still show up in a search?
Yes. PubMed keeps the original citation searchable and simply links it to the retraction notice rather than removing it. That’s why checking the linked notices matters more than just finding the paper in a search.
Related Guides on This Site
- How to Read Mushroom Research — for understanding study types before evaluating any single paper.
- Mushroom Safety and Interactions — for safety and interaction questions outside this verification workflow.
Medical Disclaimer
This page provides general educational information about how to check a study’s publication status. It is not medical advice and does not evaluate the safety or effectiveness of any mushroom, product, or supplement. Ask a qualified clinician about personal health decisions, especially if you take medicines, are pregnant or breastfeeding, or are being treated for a health condition. This is an independent educational publication and is not affiliated with any medical practice, clinic, or organization that may have previously used this domain.