Had super low Vit D. Was stuck in bed for a year. A few months of Vit D and a few other diet and supplements changes and I was out kayaking every weekend.
The heaviest man in Mexico was bedridden for years. He was depressed, but besides being humongous, and trapped in a bed; one of his biggest complains was muscle aches.
A doctor gave him vitamin D supplements and he said the pain went away.
It made a bit of sence to me, but the amount of food this guy consumed daily was staggering. I just wouldn't think a person would be deficient in D with the amount of animal products this man consumed. I just assumed even though he never saw the light of day for 15 years.
My point is it just suprised me.
Antidotially, I have been depressed (dysthymia--low level) for a good 30 years, and found sunlight didn't help me. I don't eat a lot, but i'm not a vegetarian either.
I actually feel better during the winter. I do have allergies though.
According to my doctor, all he ever said about depression is "All my patients are different. Oh, my fee will be $----. Your depression is situational.". I know he is partially right. (He doesn't overcharge me compared to the horror stories I have heard here. I just believe most psychotropic drugs should not require more one office visit, especially if you are on a low dose, and not abusing them.)