The gut has long been linked to overall health, underscoring the importance of feeding it well. A new study shows that eating citrus fruits, such as oranges, may lower the risk of depression by ...

A version of this story appears in the February 2017 issue of National Geographic magazine. Citrus, in many ways, stands alone. So many cultivated species have come from so few primary ancestors.

Scientists at Harvard Medical School and Massachusetts General Hospital have identified a possible link between regular citrus consumption and a reduced risk of depression. According to their ...