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We Asked Experts Whether Drinking Days-Old Water Is Dangerous – And Their Answer Was Surprising

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21.03.2026

We Asked Experts Whether Drinking Days-Old Water Is Dangerous – And Their Answer Was Surprising

Many of us chug leftover water without issues, but sometimes it's better for your health to just dump it.

Senior Reporter, Work/Life

I regularly drink from stray glasses of water I see scattered around my house that were poured the day before. I think I’m being efficient and resourceful, but am I being safe?

Experts say there is actually a tipping point at which it is better for your health to dump that glass of water and start afresh.

Kristen Smith, a dietitian and spokeswoman for the Academy of Nutrition and Dietetics, said that she personally follows a 12-hour rule for a........

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