What you eat affects your mood, memory and clarity of thought.
Foods that are slow to digest divert blood from the brain and reduce mental sharpness.
A key nutrient involved in conversion to alertness is a chemical found in fish, meats, egg yolks, soy products, rice and peanuts. Tuna can help to keep mentally alert.
So deciding on what you eat is important before going for exams or other important appointments as you want to be mentally fresh and alert.
