You want your blood sugar level stable as possible throughout the day.
No, double cheeseburgers provide more harm than benefits IMO. If you wanna bulk up huge without worry free of fat then by all means, disregard everything I said and eat everything. If a fast food company usually has a sandwich or meal, it usually isn't healthy whether it be from them or any other place. WHy isn't NLarge2 a good bulking shake? I am bulking now and take NLarge2, half a serving, with 50g of dextrose.