The main component of blood cells is red blood cells. One of the main factors affecting erythropoiesis is iron.

There are two kinds of iron provided by food: one is iron from animal food-organic iron, which is easily absorbed by human body and is not interfered by other substances in food. The main sources are animal whole blood, animal liver and meat. Therefore, it is good to eat some blood to replenish blood.

The other is inorganic iron from plant food, whose absorption is easily interfered by phytic acid, oxalic acid and dietary fiber in food, and its absorption degree is very low. Iron deficiency is easy to cause iron deficiency anemia. One of the dietotherapy methods to prevent iron deficiency anemia is to eat whole blood, liver and lean meat irregularly. And generally speaking, the iron absorption rate of animal foods is relatively high, about 20%.

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