Interesting theory with some support: https://mic.com/arti...-why#.hyFf9hcEp
I personally don't have much much experience with that, but I was a bit cranky while vacationing in Colorado springs, probably because my car broke ($3000+) and it didn't like the high altitude thing either.
edit: follow up of the story here: https://healthcare.u...hows=0_z5w236tn
supposedly creatine helps with the problem of high altitude depression, but this seams to be gender specific.
Edited by jack black, 19 December 2018 - 10:18 PM.