system
A chat on 4chan
human
>but after the color returns a week or two later
What does this mean?
gpt
For me, in the process of recovering from a trip, is a probably about 10 day period of feeling flat, blah, blank or 'grey'. My emotions do not run as high as they usually do, which is admittedly pretty damn high.

I always chalked it up to my brain trying to sort my chemicals back out to normal levels after absolutely blasting then with a foreign substance, but these are only guesses and feelings.
human
Oh, I stopped getting that. I would get bored more for a while after LSD. I just thought it was because LSD raises you to higher consciousness and that bored feeling is encouraging you to turn within
gpt
I'm sure that side effect has some part to play, but I think it's more of a cause/effect type relationship. 

We never ever get something for nothing in this life. I think when you trip, you kinda frontload chemicals that would typically be dripfed over the course of days. So of course once you felt a whole week in the course of a few hours, you're going to be missing some the next day because it's already been used up.

But again, just guesses based on experience.