this post was submitted on 15 Jan 2025
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[–] [email protected] 77 points 16 hours ago (10 children)

Wasn't it confirmed recently to be total nonsense and nothing to do with circadian rhythms? Compared to the sun a phone puts out very little light and the circadian rhythm only respond to slow changes in light, not on and off in a short time.

It's more about your phone keeping your mind active instead of relaxing and going to sleep. But if you already can't sleep because your mind is churning on something, a bit of distraction might actually help. It's very personal and not a clear cut rule on who has trouble sleeping from phone use or when to put down the phone.

So it isn't like using your phone before sleeping will never have an effect on how well you get to sleep. But it has nothing to do with blue light or circadian rhythms.

[–] [email protected] 5 points 9 hours ago (1 children)

Couldn't find the study confirming this. Can you link to it, please?

[–] [email protected] 4 points 9 hours ago* (last edited 9 hours ago)

I think there are multiple, I read an article recently where it was stated by an expert. But checking back now they don't link any sources except the name of the expert, which seems to be a respected expert in the field, but that means nothing in the end.

This is one of the papers I could find within 2 mins, but I think there have been multiple papers on this.

https://www.nature.com/articles/s41562-023-01791-7

There has also been a lot of criticism on the original study that said blue light from phones was the issue, so there are probably a lot of response papers to be found about that.

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