Let food be the medicine and medicine be the food. Just because you are not sick doesn’t mean you are healthy. Food supplies power for your brain as well as your body, and has a direct relationship to mental and emotional health and stability. Learning and memory illnesses such as depression, schizophrenia, Alzheimer’s disease and Parkinson’s disease benefit from a healthy, reduced-calorie diet that includes a variety of colorful fruits and vegetables and fish high in omega-3 fatty acids, such as salmon.