Your memory will improve
Eating a lot of sugar causes rapid swings in blood sugar from high to low. Either condition means that the neurons in your brain are not receiving the energy they need to function properly. The result is brain fog. You may be confused, slow to process information, and limited in your ability to remember things.
Feeling foggy can also lead to irritability when you try and fail to accomplish your goals. When you eat a balanced diet that contains the right ratio of carbs to protein and fiber, your blood sugar stays stable between meals and your brain is much more alert, able to draw conclusions and make memories.