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Even low-grade discomfort that doesnt fully wake you can prevent deep sleep stages, leaving you feeling unrested despite spending adequate time in bed

Herrmann AP, Andrejew R, Benvenutti R, Gama CS, Elisabetsky E
Can You Separate GHK and Copper

10.1016/S0076-6879(94)33021-2 288 WolhuterK.EatonP
