Iron is an indispensable substance for producing hemoglobin in red blood cells. After blood donation, tangible components such as red blood cells in the blood are relatively reduced, and bone marrow tissue must redouble its efforts to synthesize red blood cells, which requires a lot of iron. Normal people need about 1.5 mg of iron every day, and the demand will increase greatly after blood donation. Therefore, after donating blood, they need to eat foods with high iron content and easy absorption, such as pork, beef, chicken, pig liver and chicken blood.
The iron contained in these foods is called hemoglobin iron, which can be directly absorbed and utilized by the human body after entering the intestine, and is not affected by the food in the same meal, especially pig liver and chicken blood, which are rich in iron and have high absorption rate.
Rice, vegetables, beans and other plant foods also contain iron, but the absorption rate of human body is low, far less than that of animal foods. In addition, fresh vegetables and fruits are rich in vitamin C and organic acids, which can promote the absorption of iron in food, while leeks, celery, spinach or strong tea can affect the absorption of iron in food.
The maturation and development of red blood cells are inseparable from folic acid and vitamin B 12. Folic acid and vitamin B 12 are widely found in green leafy vegetables, fruits, liver and kidney of animals and yeast. So pay attention to the intake of these foods after donating blood.
Finally, it should be emphasized that blood donors should not overeat in the first few days after blood donation, especially eating a lot of high-protein food or too greasy food, which may easily lead to gastrointestinal dysfunction or acute pancreatitis. Generally speaking, as long as you have enough rest after donating blood, pay attention to the above nutritious food, don't be picky about food, and replenish it as needed, most blood donors can return to the normal level before donating blood within 2 ~ 3 weeks after donating blood.