We all know that the brain is a high-performance machine, controlling essential operations like breathing, heartbeat, movements, senses, and thoughts (among many other functions). But a high-performance machine depends on high-quality fuel. Consuming processed and refined foods and beverages can be harmful to the brain — affecting optimum brain function, and contributing to physical problems like inflammation, as well mental-health concerns, such as depression. Conversely, a clean diet, which puts an emphasis on whole foods and limits processed foods, promotes better brain health. Here are some foods that are great for brain function, and can be easily incorporated into daily life.