utrient Food Sources Neurotransmitter/ Mechanism Proposed Effect Protein Meat, Milk, Eggs, Cheese, Fish, Beans Dopamine, Norepinephrine Increased mental alertness, Increased concentration Carbohydrate Grains, Fruits, Sugars (natural and processed) Serotonin Increased calmness, relaxation Fats Meats; Dairy Reduced blood flow...