I recently had a colonoscopy and thus had to fast for over 24 hours. My mood during this fasting process was the best it's been in a long time. I felt less depressed and less anxious than I'd felt in a while.

Today I went to go get lunch with my grandfather. I hadn't eaten all day. On the way to lunch, my mood was pretty good. After eating, however, my mood nosedived and I was back to feeling depressed again.

Depression is complex, but it does seem that food, or certain foods, could be exacerbating it.