i have read several articles that debate whether sleep is the only time repletion occurs; most saying with an adequate diet and stress-reduction daytime is just fine.
Well from what I have read on the subject alot of things can cause it such as …
Stress
Diet
not going into rem sleep
Meds
neurotoxins like pesticides and stuff
Hormone inbalances
I also read you should work on these things if you think you have repletion.
Meditation or some kind of stress reducing activity like yoga
Exercise
A good balanced diet with alot of protein.
Get at least 8 hours of sleep
Its an interesting subject I will have to do a google and learn more about it
I actually had to give a speech last semester and I chose nootropics, which are substances which replenish neurotransmitters. If you’d like I can give you the speech and slides.