Wistarb Diet Gongdeok Main Branch is a restaurant in the underground food court of Lotte Castle at Gongdeok Station in Seoul, selling salads, poke, and protein boxes. The signature protein box fills a wide, deep bowl with vegetables, spaghetti noodles, and a main topping to balance protein and carbohydrates. Calories and nutritional information are listed for each menu item, and sauces such as sriracha mayo or wasabi mayo are served on the side. It connects directly to the underground area of Gongdeok Station and offers takeout in eco-friendly paper boxes.