Every entry here traces one piece of official or expert guidance from what it used to say, to what it says now — with the date it changed, who changed it, and how confident we are it'll hold.
People keep running into guidance that contradicts what they were told years earlier — eggs, coffee, aspirin, how babies should sleep — with no single place to check what changed, when, and on whose authority. Reversed is that place: a public, sourced log of official and expert guidance that changed, presented the way a changelog presents a software update — old version, new version, and the date it shipped.
Every entry traces one specific, previously-stated piece of guidance to its current version. We include the verdict as a spectrum, not a binary, because not every change is a clean reversal:
The original guidance is now considered wrong and has been formally retracted or replaced.
The core guidance shifted meaningfully, but with more nuance than a flat flip.
Experts still disagree — we show both positions rather than pick a winner.
The original guidance was questioned, then held up under further review.
Each entry links to the body or study that changed the guidance — a guideline committee, a regulator, a peer-reviewed paper — so you can check the primary source yourself rather than take our summary on faith. The "confidence it holds" indicator is our own read on how settled the current position is, not a guarantee.
Every entry is checked against its primary source before publishing — see the sourcing standard in the "Submit a reversal" section below, which applies equally to entries we add ourselves. Nothing is published on the strength of a secondary summary alone. Corrections and disputes are welcome at the contact below and will be reflected here, not quietly edited away.
Reversed is written and maintained by Jean Koffi. See the Privacy Policy below for operator details and contact.
Reversed is not medical, legal, or financial advice, and it's not a diagnosis of anyone's situation. It's a reference for how public guidance has moved over time. Always check the primary source and, for anything that affects your health, finances, or a child in your care, talk to a qualified professional.
See a piece of guidance that changed and isn't listed here? Send the old claim, the new claim, the date it changed, and a source we can verify — a guideline body, regulator, or peer-reviewed publication, not a blog post summarizing one. We check the source before anything goes live.
Email submissions to submissions@whatreversed.com.
Reversed is operated by Jean Koffi, trading as a sole trader. For any privacy question or request, contact privacy@whatreversed.com.
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