New research suggests a surprisingly simple dietary adjustment may have a notable impact on mental health. A Harvard Medical School study indicates that daily consumption of just one medium-sized orange could lower the risk of depression by as much as 20 percent, adding to a growing body of evidence exploring the gut-brain connection [[1]]. The findings, published this week in *Nutritional Psychiatry*, highlight the potential for accessible, food-based interventions to support psychological wellbeing.
Daily consumption of one medium-sized orange may lower the risk of depression by approximately 20 percent, according to research from Harvard Medical School. The finding highlights the potential link between diet and mental wellbeing, an area of growing interest for public health officials.
Raaj Mehta, MD, instructor in medicine at Harvard Medical School and a physician at Massachusetts General Hospital, explained that this effect appears specific to citrus fruits. “We found that the consumption of a medium-sized orange per day can reduce the risk of developing depression by around 20 percent,” he said. Analysis of overall fruit and vegetable intake, as well as consumption of other fruits like apples or bananas, did not reveal a similar connection to depression risk.
Researchers believe the benefit stems from citrus fruits’ ability to promote the growth of specific bacteria in the human gut. This gut bacteria activity, in turn, influences the production of neurotransmitters like serotonin and dopamine, which are known to play a role in mood regulation.
