A number of studies have shown that various aspects of our biology are changed depending on whether we are exposed to sunlight, and at different points in the day 5/
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A 2017 systematic review could not identify a single study (!) of appropriate length and duration to make any statements about blue light blockers either way 16/pic.twitter.com/YzcjziwUvC
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Do blue light glasses work? Currently, best evidence suggests they probably don't do that much, but the best evidence is really not good 17/pic.twitter.com/qD4NoAcWNr
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To sum up: - Blue light might be bad - We aren't sure, it might not be - Blocking blue light might help - It also might be a total waste of time 18/pic.twitter.com/9OwkhF122S
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Best bet seems to be that blue light blocking software/glasses might improve your sleep a little, but it's hard to know if there's a real benefit to your health there 19/
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This is particularly true given that many of the studies are unblinded and rely on self-reported symptoms, which makes them MUCH less reliable as evidence 20/
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Podcast now out on this topic and recent headlineshttps://soundcloud.com/senscipod/episode-7-blue-light-glasses …
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