The nutritional value of pork liver is as follows: 1. It can prevent and relieve iron deficiency anemia, because pork liver is rich in iron, and it exists in the form of easily absorbed divalent iron, which is very obvious in preventing and correcting iron deficiency anemia. 2. It can relieve visual fatigue and improve vision, because pork liver is rich in vitamin A, which constitutes an important raw material for the retina. Adequate consumption of pig liver can significantly relieve visual fatigue and improve vision. The danger of pig liver is that it is rich in cholesterol and fat, and if too much of it is consumed, it can cause excessive intake of cholesterol and fat, which in turn can lead to hyperlipidemia.