The duck gizzard is also known as the duck.The duck refers to the duck's stomach, which is flat and round in shape, with tightly packed meat that is firm and chewy. It has a lingering flavor without any greasiness, making it a favored dish for people of all ages.The main nutritional components of the duck include carbohydrates, proteins, fats, nicotinic acid, vitamin C, vitamin E, and minerals such as calcium, magnesium, and iron.