“We found that eating one medium orange a day may lower the risk of developing depression by about 20%,” Raaj Mehta, MD, MPH, an instructor in medicine at Harvard Medical School, a physician at Massachusetts General Hospital, and lead author of this study said in a press release.

There's the old saying of "an apple a day keeps the doctor away." But maybe it should be an orange. A new study by researchers at Harvard Medical School and Massachusetts General Hospital says eating an orange a day may lower a person's risk of depression by 20%.

A study published in the journal BMC Microbiome found a link between eating citrus and depression risk, suggesting that you may be able to lower your risk of developing depression by doing something as simple as adding oranges into your daily diet.