So, if I were depressed, I could walk around eating dark chocolate and feel better. And saving the cost of the shrink, go out for a nice steak. Nice.
If you are depressed then you can take Vitamin D3 supplements and no more depression. Or flu. Or colds. All are the result of Vitamin D deficiency. Sunshine works best but is not always available as one covers up in the winter. Ever hear of winter blues?