June 7, 2026 · 8:28 AM

Myth #4 — The 8 Glasses of Water Rule: A Misread Paper That Outlasted Its Source

The '8 glasses a day' rule traces back to a 1945 recommendation that was widely misread — the original text noted that most of that water comes from food. Peer-reviewed reviews find no evidence for the rule, and urine color is a more reliable guide than a glass count.

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