Dr. Eric Berg DC
April 16, 2026 · 3 min read
Why Drinking 8 Glasses of Water Per Day is a Myth
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Key Takeaways
- 1The widely accepted belief that we need to drink eight glasses of water per day is one of the most persistent health myths of our time.
- 2The origin of this myth traces back to 1945 when the Food and Nutrition Board of the National Research Council published dietary guidelines.
- 3This crucial detail changes everything.
- 4Remarkably, there has never been a single clinical trial establishing how much water humans need to drink for optimal health.
- 5The fundamental flaw in the eight glasses approach is that it completely ignores individual variation.
Overview
The widely accepted belief that we need to drink eight glasses of water per day is one of the most persistent health myths of our time. Despite being repeated countless times by health professionals and the general public alike, this recommendation has no scientific foundation whatsoever.
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