Medicine

What did Frederick S. McKay discover in local drinking water?

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In the early 1900s, Frederick S. McKay, a Colorado dentist, discovered that an unknown substance in the local drinking water caused a mottling or staining of the teeth and that these teeth also showed fewer cavities.

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Similar questions: What did Frederick S. McKay find in local drinking water? What was the discovery about local drinking water that Frederick S. McKay found? [ Hide these questions ]

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