Does Junk Food Cause Depression

This study of 8,964 people looked at the connection between eating junk food and developing depression. It found that . . . 

eating processed pastries increases your risk of depression by a full 38%. It also found that people who eat the most fast food are 36% more likely to develop depression than people who eat the least.

(Public Health Nutr 2012;doi:10.1017/S1368980011001856)