# Less Than 42 Minutes of Bright Light Daily Is a Stronger Predictor of Dementia Than Obesity, Study Finds

Source: [ScienceAlert](https://www.sciencealert.com/less-than-42-minutes-of-daily-bright-light-is-a-stronger-predictor-of-dementia-than-obesity-study-finds) · 2026-11-07 · Life
Page: https://themorning.science/story/less-than-42-minutes-of-bright-light-daily-is-a-stronger-predictor-of-dementia-t-f7635b03b49c3920
Kind: research · Impact: medium

## In brief

- A study links less than 42 minutes of bright light daily to dementia risk.
- The study reports this measure as a stronger predictor of dementia than obesity.
- The source is a ScienceAlert report published 2026-11-07; the full study details were not provided.

## Why it matters

If daily light exposure predicts dementia risk better than obesity does, it may be a useful early signal for brain health, though the source gives no details on how the link was measured.

## Coverage

- [Less Than 42 Minutes of Bright Light Daily Is a Stronger Predictor of Dementia Than Obesity, Study Finds](https://www.sciencealert.com/less-than-42-minutes-of-daily-bright-light-is-a-stronger-predictor-of-dementia-than-obesity-study-finds) — ScienceAlert, 2026-11-07

Tags: dementia, light exposure, obesity, brain health, research

---

Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Science – https://themorning.science