[orasis]

N=1 I noticed a huge immediate positive shift in subjective well being when I started on vitamin D.

[mistermisterand]

I cycle 4k iu of vitamin d daily during the darker winter months to keep my mood from tanking. Works every time.

[zadokshi]

Yep, I’ve noticed the same correlation. Whenever I’m going through a longer stint of feeling down. It’s usually because I’ve stopped taking vitamin d. I’m reasonably convinced there is some kind of correlation.