{"id":165496,"date":"2026-11-09T15:57:35","date_gmt":"2026-11-09T15:57:35","guid":{"rendered":"https:\/\/un-news.org\/?p=165496"},"modified":"2026-11-09T15:57:39","modified_gmt":"2026-11-09T15:57:39","slug":"study-less-than-42-minutes-of-daylight-exposure-may-increase-dementia-risk-revealing-the-minimum-beneficial-duration-for-the-brain","status":"publish","type":"post","link":"https:\/\/un-news.org\/en\/study-less-than-42-minutes-of-daylight-exposure-may-increase-dementia-risk-revealing-the-minimum-beneficial-duration-for-the-brain\/","title":{"rendered":"Study: Less Than 42 Minutes of Daylight Exposure May Increase Dementia Risk, Revealing the Minimum Beneficial Duration for the Brain"},"content":{"rendered":"

A new study published in the journal General Psychiatry<\/em> and reported by ScienceDaily has found that greater exposure to light during the day is associated with a lower risk of dementia, highlighting the importance of daylight in maintaining brain health, despite being a factor that may not receive sufficient attention.<\/p>\n

Researchers analyzed data from 87,577 adults who wore wrist devices equipped with accelerometers to monitor their exposure to light during the day and at night. Over an average follow-up period of 8.1 years, 741 participants were diagnosed with dementia.<\/p>\n

The findings showed that people exposed to average daytime light levels exceeding 1,000 lux, a moderate brightness level comparable to outdoor light on a cloudy day, had a 16% lower risk of developing dementia compared with others. Longer exposure to brighter light, at an intensity of 5,000 lux or more, was also associated with a further reduction in risk.<\/p>\n

One of the most notable findings was that very limited exposure to bright daylight was associated with a higher likelihood of developing dementia. The study found that getting less than 0.7 hours per day, or less than 42 minutes, of bright light was a strong indicator of dementia risk, outperforming six other known risk factors in its predictive ability.<\/p>\n

By contrast, the researchers found no statistically significant association between nighttime light exposure and dementia risk, suggesting that bright light during the day is the more prominent factor in this relationship.<\/p>\n

Lead researcher Hongliang Feng of Guangzhou Medical University in China said that daylight exposure could serve as a new indicator for assessing dementia risk and could open the door to incorporating it into future brain health assessment strategies.<\/p>\n

Despite the significance of the findings, the researchers emphasized that the study does not establish a direct causal relationship, nor does it conclusively prove that increased daylight exposure prevents dementia. However, it reveals a strong association that warrants further research to understand its underlying biological mechanisms.<\/p>\n

The researchers suggest that daylight may help regulate the biological clock, improve sleep quality, and support neurological processes related to brain health. However, they noted that further studies are needed to determine whether increasing exposure to natural light could be an effective way to reduce dementia risk.<\/p>\n

These findings highlight the importance of a simple daily factor that is often overlooked, yet may provide important insights into brain health and the likelihood of cognitive decline with age.<\/p>\n

United News Network \u2013 UNN Arabic<\/strong><\/p>\n

An independent media platform providing reliable news and objective analysis, seeking to promote peace and cultural dialogue around the world, convey the truth, and build bridges of understanding among peoples.<\/p>\n

For more news, visit our homepage:<\/strong><\/p>\n

https:\/\/un-news.org<\/a><\/p>\n

Author:<\/strong> Counselor Faisal Al-Mutairi.<\/p>\n

Publication Date:<\/strong> November 9, 2026.<\/p>\n

Updated:<\/strong> November 2026.<\/p>\n","protected":false},"excerpt":{"rendered":"

A new study published in the journal General Psychiatry and reported by ScienceDaily has found that greater exposure to light during the day is associated with a lower risk of dementia, highlighting the importance of daylight in maintaining brain health, despite being a factor that may not receive sufficient attention. Researchers analyzed data from 87,577 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50],"tags":[],"tmauthors":[74],"class_list":{"0":"post-165496","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-health-news"},"_links":{"self":[{"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/posts\/165496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/comments?post=165496"}],"version-history":[{"count":2,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/posts\/165496\/revisions"}],"predecessor-version":[{"id":165498,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/posts\/165496\/revisions\/165498"}],"wp:attachment":[{"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/media?parent=165496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/categories?post=165496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/tags?post=165496"},{"taxonomy":"tmauthors","embeddable":true,"href":"https:\/\/un-news.org\/en\/wp-json\/wp\/v2\/tmauthors?post=165496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}