High levels of vitamin C are maintained in cells and tissues and are highest in leukocytes (white blood cells), eyes, adrenal glands, pituitary gland and in the brain.
Unlike some animals, the human body cannot produce vitamin C, so it needs to be obtained through a healthy and balanced diet. The most common sources of vitamin C are fruits and vegetables (especially citrus fruits). Interestingly, prolonged storage or cooking can reduce quantities of vitamin C in foods. Hence, it is important to eat raw fruits and vegetables that contain vitamin C to meet your recommended daily intake.