Nutrition significantly impacts mental clarity and focus by providing essential nutrients that influence brain function. A balanced diet rich in omega-3 fatty acids, antioxidants, vitamins, and minerals supports cognitive health, enhancing memory and concentration. Foods like fatty fish, leafy greens, nuts, and whole grains nourish the brain and help regulate mood. Additionally, maintaining stable blood sugar levels through regular meals can prevent mental fatigue. Thus, good nutrition plays a crucial role in optimizing mental performance and productivity throughout the day.