Google Medic Update
Google Medic Update is the informal name for a major Google core algorithm update rolled out in August 2018, which had especially large impact on health, medical, and YMYL (“Your Money or Your Life”) sites - though it affected rankings across many verticals. The name was coined by Barry Schwartz at Search Engine Land based on the disproportionate volatility observed in health-related sites.
One of the most-discussed updates in SEO history. Established the now-standard concept that Google holds YMYL content to higher standards for expertise, authority, and trustworthiness (the original E-A-T framework, since extended to E-E-A-T with Experience added).
What the update actually changed
Three observable patterns from the rollout and aftermath:
Health sites without clear authorial expertise lost ranking. Sites publishing medical content without named medical professionals as authors, or with vague “medical reviewer” claims, dropped substantially. Sites with explicit credentialed authorship gained.
Sites with shallow YMYL content were systematically suppressed. A 600-word blog post about a serious medical condition stopped competing with 3,000-word professionally-written or institutional content. Depth and rigor became table stakes.
Brand authority signals weighted more heavily. Established medical brands (Mayo Clinic, WebMD, NIH, established medical journals) gained ranking share. New or less-established sites lost share even when individual articles were technically well-written.
Why “Medic” was a misleading name
Two clarifications that emerged later:
The update wasn’t health-specific. Health sites were the most visibly affected because they had the most volatility, but financial, legal, government-affecting, and other YMYL categories also saw significant changes. Many non-YMYL sites also moved - just less dramatically.
It wasn’t a one-off. What looked like a single update was actually the start of an ongoing pattern: every subsequent core update has continued tightening YMYL standards. The original Medic Update was the first big visible step in a long process.
What the update established as best practice (still relevant in 2026)
Three patterns now considered baseline for any site touching health, finance, legal, or other YMYL content:
Named author with verifiable expertise. Real person, real credentials, real biography. “Reviewed by Dr. X” claims need to actually link to Dr. X’s verifiable credentials.
Editorial standards visible. Methodology, sourcing, fact-checking process described publicly. Updates to articles dated and explained.
Site-level credibility signals. About page with real organisation info, contact details, editorial team listed, mention in third-party authoritative sources.
An example
A solo content creator running a niche affiliate site about supplements lost about 80% of organic traffic in the August 2018 update. Site had been ranking well for “best [supplement] for [condition]” queries.
The audit found the obvious YMYL problem: anonymous authorship, no medical review, supplement claims that the site couldn’t credibly stand behind. The site was competing with WebMD, Mayo Clinic, and Healthline on queries that algorithmically should never have been winnable for an anonymous affiliate.
The pivot: stop targeting medical-condition queries entirely. Reposition to product-comparison queries (“best [supplement brand] vs [other brand]”) which weren’t YMYL. Keep affiliate revenue model but compete on a different query set where credibility bar was lower.
The site never recovered its August 2018 traffic profile. The new query set was smaller but real - affiliate revenue stabilised at about 40% of the previous peak. Lesson learned the hard way: build a site whose ranking is honestly defensible at Google’s current standards, not a site that wins via gaps the algorithm will eventually close.
We built Penfriend after the Medic update because we understood its implications: YMYL content that doesn’t demonstrate expertise gets deranked. Voice-trained, SME-guided content survives Medic-style updates in ways generic AI content doesn’t.
Related terms
- Google Algorithm - the broader system the Medic Update was a notable change to
- Algorithm - the abstract concept Medic-style updates instantiate
- Black-Hat SEO - the broader category of practices algorithm updates regularly target
- Domain Authority - the metric proxy that often moved sharply after Medic
- Duplicate Content - an adjacent SEO concern algorithm updates also address