April 2021-Monograph: NTP Cancer Hazard Assessment Report on Night Shift Work and Light at Night

April 2021

Summary of NTP Cancer Hazard Conclusions Exposure Circumstances That Cause Circadian Disruption:
Persistent Night Shift Work
Certain Lighting Conditions


Selected images:

NTP Review of Shift Work at Night, Light at Night, and Circadian Disruption

Topic Overview

Status: NTP cancer hazard assessments

Conclusion(s): NTP concluded that

(1) persistent night shift work can cause breast cancer in women and

(2) certain lighting conditions may be linked to cancer.


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