The main nutrients of gizzard are carbohydrates, protein, fat, niacin, vitamins and minerals such as calcium and magnesium. Duck gizzard main nutrients are carbohydrates, protein, fat, niacin, vitamin C, vitamin E and calcium, magnesium, iron, potassium, phosphorus, sodium, selenium and other minerals. Duck gizzard is rich in iron, women can eat more appropriately. According to Chinese medicine, duck gizzard is sweet, salty and flat in nature, and has the effect of strengthening the stomach.