Identity & Authority: MedlinePlus – Signal Evidence & AI Readability

MedlinePlus

(https://medlineplus.gov) 📸 Data Snapshot: May 19, 2026
Identity & Authority — The Lens

Inspect the JSON-LD. Is there an Organization or Person schema, and does it carry sameAs links to real external profiles (LinkedIn, socials)? Missing schema or no identity declaration signals an anonymous entity.

Identity & Authority Expert verifiability & Schema depth.
14 Impact Weight: 15 / 100
93% Reputation

Authority is established through institutional weight rather than individual personality, which is appropriate for a federal entity. The schema_json includes Organization data with sameAs links to official social profiles, though it lacks Person schema for specific medical contributors. The technical implementation is highly disciplined, with perfect alignment between the .gov secure website claims and the metadata, showing no technical credibility gaps.

There is no marketing-to-substance disconnect because the site makes no commercial performance claims. Instead of claiming to ‘improve your health,’ it promises to provide ‘information on symptoms, causes, treatment and prevention,’ which it proves by hosting over 1,000 disease entries. The site’s data is verified as current, with a ‘Copyright 2026’ anchor on the drug information page matching the current temporal anchor.

Identity & Authority is read from the structured data first: whether the site declares who it is in machine-readable schema, with verifiable identity links. Below is the schema captured per page, then the external proof links that support (or fail to support) that identity.

🔗 Identity & Technical Layer — schema JSON-LD: identity chains, entity gaps
Homepage schema
[
    {
        "@context": "http://schema.org",
        "@type": "WebSite",
        "url": "https://medlineplus.gov/",
        "name": "MedlinePlus"
    },
    {
        "@context": "http://schema.org",
        "@type": "Organization",
        "url": "https://medlineplus.gov/",
        "name": "MedlinePlus",
        "description": "Find information on health conditions, wellness issues, and more in easy-to-read language on MedlinePlus, the up-to-date, trusted health information site from the NIH and the National Library of Medicine.",
        "logo": "https://medlineplus.gov/images/m_logo_primary_rwd.png",
        "sameAs": [
            "https://www.facebook.com/mplus.gov/",
            "https://twitter.com/medlineplus",
            "https://plus.google.com/+MedlineplusGovNLM"
        ]
    }
]
/about/ — no schema detected (entity gap)
/healthtopics.html — no schema detected (entity gap)
/druginformation.html — no schema detected (entity gap)
/genetics/ — no schema detected (entity gap)
/lab-tests/ — no schema detected (entity gap)
🛡️ Trust Signals — external proof links that back the declared identity
1Review mentions (all pages)
0External proof links (all pages)
PageReviewsProof links
/ (home) 0 0
/about/ 0 0
/healthtopics.html 1 0
/druginformation.html 0 0
/genetics/ 0 0
/lab-tests/ 0 0