please stop giving health advice.. Burger King is the worst and most unhealthy way to gain weight. If you want to gain weight, you have to start weight lifting and eating properly. Get 1g of protein for every pound you weigh. So if you're 150lbs, try to get 150grams worth of Protein each day from your meals and/or protein shakes. I'm a hard gainer and I find that milk, rice, bread, steak, and pasta work best if you're trying to bulk up (well for me atleast). You want high calories, high protein, high carbs, and always low fat.