Dr. Drew Ramsey, a psychiatrist at Columbia University, said it is all about the brain. Without vitamins or nutrients, the body cannot make brain chemicals such as serotonin, which are necessary for clear thinking and good mood.
“The gears of the brain just don’t run as well, so you’re going to feel more irritable,” he said.
Deficiencies in these nutrients have been correlated strongly with increases in aggressive behavior and even violent acts.
Read more at http://newyork.cbslocal.com/2013/02/27/seen-at-11-avoiding-bad-mood-food/