The world's largest study on light exposure and its impact on mental health, with almost 87,000 participants, has found that increased exposure to light at night increases a person's risk for psychiatric disorders such as anxiety, bipolar and PTSD severity as well as self-harm. Importantly, the study also found that increasing exposure to daytime light can act like a non-pharmacological means for reducing psychosis risk. In those exposed to high amounts of light at night, the risk of depression increased by 30 per cent – while those who were exposed to high amounts of light during the day reduced their risk of depression by 20 per cent.

https://www.miragenews.com/unprecedented-study-confirms-light-exposures-1100042/

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