For young children, it is best to eat pig liver l~2 times a week to prevent malnutrition. Therefore, cooking methods should be emphasized. Most children like to eat pork liver mixed with other animal foods, such as diced pork liver and bacon, diced fresh meat and egg pieces, or fried pork slices with pork liver. It is also a good way to make pork liver into pork liver slices or bittern liver slices, and wash your hands and eat them one by one before children eat them. Usually adults tell their children more stories about pig liver, so that children can understand why they want to eat pig liver. This not only corrected the habit of children not eating pig liver, but also increased their knowledge. You can also eat these such as animal blood, liver, chicken gizzards, beef kidneys, soybeans, black fungus and sesame sauce. Lean meat, brown sugar, egg yolk, pig kidney, sheep kidney, dried fruit. General sources: fish, grain, spinach, lentils, peas, mustard leaves. Trace sources: dairy products, vegetables and fruits.