Changing Your Diet Can Help Tamp Down Depression, Boost Mood
I dunno for me.  I try to eat healthy and keep my weight down, but I'm happiest when I'm eating poorly.  I get kind of run down and depressed when it's meal after meal of veggies and chicken, or just small portions of whatever.  A pizza and a soda, or a huge steak and garlic mashed potatoes will lift my mood quickly. Then it's very hard to go back to healthy again.  There's no question eating healthy helps my physical wellbeing though, so I do it.