Can't eat pig blood at night? You can eat pig blood at night to avoid overeating. Pig blood is rich in nutrition. 100g pig blood contains about16g protein. It contains a variety of essential amino acids and is rich in minerals such as calcium, iron, potassium and sodium. Can prevent anemia, atherosclerosis, coronary heart disease, can absorb dust and some metal substances in the body to help discharge. Pig blood is especially suitable for teachers, coal miners, chemical workers, printing and dyeing people.