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A comment on Melatonin: Much More Than You Wanted to Know. Parent comment

Re:Melatonin: Much More Than You Wanted to Know by luc4sdreyer on Sunday July 29, 2018 @03:05AM (#17636922)
> if CO2 levels get up to around 700ppm which can happen in a few hours of going to bed, you will also wake up feeling less refreshed and groggy

source?

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