The study, done by researchers at the University of Las Palmas de Gran Canaria and the University of Granada, followed nearly 9,000 participants for six months none of whom had been diagnosed with depression or had taken antidepressants. They found that those who ate the most fast food were nearly twice as likely to be diagnosed with depression as those who ate little or none.

　　Now, this doesn’t necessarily mean that eating fast food causes depression. It could be the other way around that people who become depressed for whatever reason tend to eat more fast food. But while it’s not certain that consuming fast food causes depression, the chance that it might is yet another reason to get off the fast food track and opt for more healthful options.