ADD is caused by sugar. The sugar if it is in excess in the blood sticks to the proteins creating the waste AGE (advanced glycation end). And the more sugar there is in the blood, the more AGE waste will be formed and the worse physical and mental health we will have. If we have this waste in the brain we will have drowsiness during the day because the brain wants us to sleep because during the sleep increases up to 20 times the elimination of brain waste by the glymphatic system. And the drowsiness causes tiredness, suffering, bad mood, violence, depression, stress, little mental clarity, poor memory, low intelligence, addictions…. To see the level of PGA is the analysis of glycated hemoglobin. An optimal level is 4 to 5%, a diabetic usually has 9 to 12% For every 1% increase in glycated hemoglobin there is 28% more mortality. To eliminate PGA waste from the body and brain we have to control the sugar in blood, for this we can eat a diet low in carbohydrates such as the ketogenic diet. We can also eat a lot of carbohydrates but prefer low and medium foods glycemic index to high, and especially making many small meals a day instead of few large meals. At dinner it is better to avoid carbohydrates.