Oranges are rich in vitamin C, an antioxidant that fights off free radicals that can damage brain cells. A 2017 study showed that young adults who drank 17 ounces (0.5 liters) of either orange or grapefruit juice had greater blood flow to the brain. Older adults who drank the same amount over an eight-week period showed improved overall brain function.
Eating one medium orange every day could improve focus, memory, attention, and decision speed.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.