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Tag: fasting

How Long Can Humans Fast? The Science of Fasting and Metabolism

  • Barry Sears
  • Estimated read time 5 min read
  • November 18, 2025

Key Takeaways The human body is surprisingly fragile. Most people can survive only about three minutes without oxygen and about three days without water. Beyond those…

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Categories: Ask Dr. Sears, Latest News
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