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There are lots of studies and articles discussing the affects of blue light on melatonin and sleep https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncb

There are lots of studies and articles discussing the affects of blue light on melatonin and sleep https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... https://www.healthline.com/nutrition/block-blue-light-to-sleep-better https://www.healthline.com/nutrition/block-blue-light-to-sle... https://brighamhealthhub.org/prevention/using-light-emitting-devices-before-bed-may-impact-sleep https://brighamhealthhub.org/prevention/using-light-emitting... https://www.scientificamerican.com/article/q-a-why-is-blue-light-before-bedtime-bad-for-sleep/ https://www.scientificamerican.com/article/q-a-why-is-blue-l...

behringer 7y ago
https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future studies better "The review enables further development of an evaluation method of light pollution in LCA regarding the light-induced impacts on human circadian system." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ No definitive conclusions: "Additional laboratory-based and field studies are still necessary to better understand some features of the human circadian response to light. We are only beginning to understand how prior exposure to light affects the subsequent response to a light stimulus, and our understanding of how light exposure can affect the period of the human circadian system is also limited (135)." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ Seems to be a review of other research by a journalist https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... news article, not science https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... News article, not science I'd go through the rest but it's time for lunch.
Obi_Juan_Kenobi 7y ago
That's a different claim. Blue light can interfere with Circadian signalling. Nothing new there, though the issue is under-recognized. What is being claimed is that blue light is good for staying alert, presumably during the working day. That's more tricky, and would argue that blue-light is reinforcing some aspect of the cycle or has a unique physiological effect. This is, however, unlikely; blue light serves primarily to entrain the clock, i.e. to keep it in period and phase with the daily cycle. Without this light signaling, your clock will 'free run' which is a cycle that is slightly longer than the 24 hour cycle. Crucially, it's important to note that the clock functions just fine, it just no longer adheres to a strict 24 hour cycle. The idea that more blue light throughout the day, beyond the morning zeitgeber, would have an effect on performance is very different idea. To my knowledge, there is not any evidence that this would be the case, and it is contrary to my understanding of Human Circadian Rhythms.

behringer 7y ago

https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future studies better "The review enables further development of an evaluation method of light pollution in LCA regarding the light-induced impacts on human circadian system." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ No definitive conclusions: "Additional laboratory-based and field studies are still necessary to better understand some features of the human circadian response to light. We are only beginning to understand how prior exposure to light affects the subsequent response to a light stimulus, and our understanding of how light exposure can affect the period of the human circadian system is also limited (135)." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ Seems to be a review of other research by a journalist https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... news article, not science https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... News article, not science I'd go through the rest but it's time for lunch.

Obi_Juan_Kenobi 7y ago

That's a different claim. Blue light can interfere with Circadian signalling. Nothing new there, though the issue is under-recognized. What is being claimed is that blue light is good for staying alert, presumably during the working day. That's more tricky, and would argue that blue-light is reinforcing some aspect of the cycle or has a unique physiological effect. This is, however, unlikely; blue light serves primarily to entrain the clock, i.e. to keep it in period and phase with the daily cycle. Without this light signaling, your clock will 'free run' which is a cycle that is slightly longer than the 24 hour cycle. Crucially, it's important to note that the clock functions just fine, it just no longer adheres to a strict 24 hour cycle. The idea that more blue light throughout the day, beyond the morning zeitgeber, would have an effect on performance is very different idea. To my knowledge, there is not any evidence that this would be the case, and it is contrary to my understanding of Human Circadian Rhythms.