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To check whether an AI health answer is reliable, open the original sources it cites and verify that each one supports the specific claim. Then evaluate who produced and reviewed the source, what evidence it relies on, when it was updated, and whether independent medical sources agree. A citation or confident answer is a reason to investigate—not proof that the answer is correct or that the AI actually relied on that source.
1. Turn the answer into claims you can check
AI health responses often combine several kinds of statements: a possible diagnosis, advice about a medicine, a statistic, and a summary of a study. Treat each as a separate claim rather than accepting or rejecting the response as a whole. Start with anything that could affect a health decision, such as a recommendation to start, stop, or change a treatment.
- Mark diagnoses, treatment recommendations, medication instructions, statistics, and claims about research.
- For each claim, ask what evidence would be needed to support it.
- Record which citation the answer gives for each claim. If no source is provided, treat the claim as unsupported until you can verify it independently.
2. Open the cited source and test what it says
Follow the citation to the source itself. Do not rely on the AI’s description, a search-result snippet, or a page title: they may not represent the source’s full context. The NIH Office of Dietary Supplements advises readers to look for original sources and references for medical facts and figures, and to distinguish evidence-based information from opinion or advice (NIH ODS: How To Evaluate Health Information on the Internet).
- Open the link and confirm it leads to the document or page the answer names.
- Find the relevant passage, data, or study result in the source.
- Compare the source’s wording and context with the AI’s claim. Check whether the source supports the same population, condition, outcome, and level of certainty.
- If the source is inaccessible, the link is broken, or the cited document does not support the claim, label the claim unverified rather than assuming the citation is valid.
A citation may point to a real source and still fail to support the claim attached to it. Checking support tells you what the citation says; it does not establish whether the AI used that source internally.
#1 Best Overall
3. Check who is responsible for the information
Look for the organization or person accountable for the page, the author’s or reviewer’s relevant qualifications, the content review process, and a way to contact the publisher. MedlinePlus names government agencies, medical schools, and established professional or nonprofit organizations as generally useful starting points, but advises evaluating the particular information rather than trusting a source category automatically (MedlinePlus: Evaluating Health Information).
A .gov, .edu, or .org address can offer a clue about the kind of organization behind a site, but it does not by itself prove that a particular health claim is accurate or current. Check the publisher, review process, evidence, funding, and purpose.
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4. Look for incentives and evidence
Check the source’s purpose
Find out who owns or funds the site and whether it sells a product, service, or treatment discussed on the page. Advertising and commercial interests can influence how information is presented. Be cautious with guaranteed-cure language, dramatic promises, and one-sided promotion; compare the claim with an independent source. MedlinePlus and NIH ODS both recommend considering ownership, purpose, and funding when evaluating online health information.
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If the answer cites a study, check the study itself rather than relying only on a news article or summary. Ask:
- Was the research conducted in people or animals?
- Who participated, and how many people were included?
- How long did the study last?
- What kind of study was it?
- Who funded it?
These details help show what a finding can and cannot establish. For example, a result in a particular group or under a limited study design may not justify a broad claim about everyone or a recommendation for an individual.
5. Check dates and compare independent sources
Find the publication, review, or update date on the source. Health guidance and evidence can change, so an older page may not reflect current knowledge. Compare consequential claims with another independent, reliable medical source, and check its date and evidence too. Agreement is more meaningful when the sources are genuinely independent and explain their basis, rather than repeating the same original report.
If reliable sources disagree, or the evidence does not clearly support the answer, keep the claim unresolved. Do not treat the AI’s confidence—or the number of citations—as a substitute for resolving the disagreement.
6. Keep personal decisions with a health professional
Even accurate general information cannot account for your complete medical history, current medicines, allergies, or other personal circumstances. MedlinePlus advises: “Discuss the information you find with your health care provider before you rely on it.” Take the answer and its sources to a qualified health professional before acting on a consequential health recommendation. If a source cannot be opened, does not resolve to the document claimed, or leaves an important claim disputed, treat that claim as unverified and ask a clinician.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.7. Protect your health information
Before entering symptoms, diagnoses, medication details, or other personal health information into an AI service or website, read its privacy policy. Check what information it collects, how it may be used or shared, and what choices you have. NIH ODS says a site requesting personal information should explain what it will and will not do with it.
A quick checklist
- Separate the answer into specific, consequential claims.
- Open each citation and confirm that the original source supports the claim.
- Identify the publisher, author or reviewer, review process, funding, and purpose.
- For research, check the study type, participants, duration, and funding.
- Check update dates and corroborate important claims with independent sources.
- Ask a health professional before using online information to make a personal medical decision.
- Review privacy terms before entering health details into a service.
The National Library of Medicine’s tutorial offers another way to practice evaluating health information online: Evaluating Internet Health Information tutorial. Its reminder applies to AI-linked sources as well: “Both sites look professional, but anyone can put up a web page that looks good.”
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