If you're feel a little down, moody, or mentally fatigued, you may need to eat and drink more citrus foods. Citrus foods have the highest concentration of Vitamin C. Vitamin C is commonly known as an immune boost, but studies now confirm that it improves brain function and can help boost your mood. For instance, a study done on high school students found that Vitamin C reduced anxiety levels (1). Because Well juices are loaded with citrus fruits, having one a day can keep your mood balanced. Below is an infograph pointing out some of the positive effects citrus juice has on your brain.