Forget apples—researcher outlines how an orange a day may reduce depression risk by 20%

Eating an orange a day may lower a person’s depression risk by 20%, according to a study published in Microbiome. That might be because citrus stimulates the growth of Faecalibacterium prausnitzii (F. prausnitzii), a type of bacteria found in the human gut, to influence production of the neurotransmitters serotonin and dopamine—two biological molecules known to elevate mood.