Story perspectives

Artificial Light Linked to Heart Disease Risk: Study

11/5/2025

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Summary

Story summary

New research presented at the American Heart Association's Scientific Sessions 2025 links artificial nighttime light to increased brain stress signals, artery inflammation, and heart disease, in 466 adults from Massachusetts General Hospital.
Over a 10-year follow-up, 17% developed significant heart issues.
Researchers recommend reducing outdoor lighting and limiting indoor light exposure before sleep.
The study is observational and may not establish causation, and participants may not reflect a diverse population.

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Story summary

New research presented at the American Heart Association's Scientific Sessions 2025 links artificial nighttime light to increased brain stress signals, artery inflammation, and heart disease, in 466 adults from Massachusetts General Hospital.
Over a 10-year follow-up, 17% developed significant heart issues.
Researchers recommend reducing outdoor lighting and limiting indoor light exposure before sleep.
The study is observational and may not establish causation, and participants may not reflect a diverse population.