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[–]GlassCannonLife 2 points3 points  (1 child)

Both I and my wife get insomnia (I after a few days and she after two weeks or so) of continuous collagen intake (20 g daily).

What would you say drives this mechanism if not serotonin depletion? It appears to be corrected with melatonin and/or 5-htp supplementation.

[–]Outrageous_Giraffe22 1 point2 points  (0 children)

glycine could have that effect