Duck gizzard is generally more difficult to cook than duck meat, ordinary pot to cook about 10 minutes. Nutritional value of duck gizzard:The main nutrients of duck gizzard are carbohydrates, protein, fat, niacin, vitamin C, vitamin E, and minerals such as calcium, magnesium, iron, potassium, phosphorus, sodium, selenium and so on. Duck gizzard is rich in iron, women can eat more. According to Chinese medicine, duck gizzard is sweet and salty and has the effect of strengthening the stomach. Duck gizzard is the duck's stomach. The stomach of birds is divided into the giant stomach (megastomach) and myogastric stomach (myogastric). Gland wall is thin, wall cells secrete gastric acid and a variety of digestive enzymes for soaking and digesting food; stomach has a well-developed muscular wall, the inner wall is covered with a layer of hard corneal membrane (Chinese medicine is called chicken gold), the inner lumen contains a number of small grains of sand (swallowed by birds), its role is similar to the teeth to grind food.