From the Journals

How Lead Exposure Changed Over a Century 

Hair-based mass spectrometry links declining lead exposure to environmental regulation 

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  • February 17, 2026

  • 2 min

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    Hair samples provide a stable record of lead exposure.

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    Study examined data from 1916 to

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    Lead levels dropped drastically post-EPA regulations.

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    Samples showed 30-100 ppm lead before

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    Below 1 ppm lead has been recorded since

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    Advanced mass spectrometry allowed analysis of individual hair strands.

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    The study highlights the importance of environmental regulation for public health.

Original Source(s)

How Lead Exposure Changed Over a Century 

Hair-based mass spectrometry links declining lead exposure to environmental regulation 

  • February 17, 2026

  • 2 min

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