Blood is a kind of fluid tissue that circulates in the cardiovascular system under the impetus of the heart. It is an important part of human body, accounting for about 7-8% of body weight. A person weighing 50 kilograms has a total blood volume of about 3000-4000 ml. Under normal circumstances, only 80% of this blood runs in blood vessels, and the other 20% is stored in the liver and spleen for emergencies. A normal person's blood donation or traumatic bleeding of 300-400 ml at a time will not affect human health, because the reduction of blood volume will stimulate the hematopoietic function of red bone marrow. If the nutrition is proper after blood transfusion, the water in the blood can be replenished in two to three days. Within a month, iron, protein, vitamins, folic acid, etc. It can also be gradually restored, and the core component hemoglobin can also be restored to the amount before blood donation within two to three months. Therefore, a blood transfusion of less than 400ML for healthy people will not affect their health.
The nutritional supplement after blood donation is generally appropriate to increase various nutrients necessary for hematopoiesis. Hematopoietic raw materials mainly include protein, iron, folic acid and vitamin B 12.
Foods containing high-quality protein are: milk, lean meat, eggs, bean products, etc.
Foods containing more iron include: animal liver, jellyfish, shrimp, sesame, kelp, auricularia auricula, laver, mushroom, pea, jujube, longan and so on. In addition, you can choose an iron pot when cooking.
Foods containing more folic acid are: pig liver, pig kidney, beef and so on.
Foods containing vitamin B 12 are: animal liver, pig kidney or sheep kidney, fermented bean curd, etc.
In short, you don't need to eat anything special after donating blood, as long as you eat scientifically and reasonably, have nutritional value, are delicious, comfortable and moderate, you can recover the lost blood in a short time.