Blood donation can stimulate the body’s hematopoietic function, accelerate the body’s metabolism and enhance the body’s immunity. The normal amount of blood donation for adults is usually 200-400mL, which will not have much effect on the body. After blood donation, you can eat some foods to help replenish the raw materials for hematopoiesis: 1. Protein supplement: such as lean meat, beef, eggs, milk, etc. These foods contain high-quality protein and various elements needed for human hematopoiesis, which can accelerate the body’s hematopoietic recovery; 2. Iron supplement: iron is an important element for synthesizing human hemoglobin. 3. Folic acid and vitamin B12 supplementation: Folic acid and vitamin B12 play an important role in the maturation and development of red blood cells, and beans, fish, shellfish and green vegetables contain a lot of folic acid and vitamin B12, which can be consumed in moderation after blood donation. In addition to dietary adjustments after blood donation, attention should be paid to keeping the blood donation location clean and free of contamination, taking rest and avoiding strain, and not working at height or driving two days after blood donation. If you have obvious dizziness, fatigue, pale face, cold sweat, etc., you need to seek medical examination in time to determine whether you have anemia or other abnormalities.