Food does not have a blood replenishing effect on the organism, but only replenishes nutrients. Therefore, it is beneficial to consume some food containing high quality protein, iron and other nutrients in moderation after blood sampling. Food itself only has nutritional value for the human body, but not for the body to play the effect of blood. When the human body after the blood draw, will lose part of the blood, so through the intake of food nutrients can help to improve the body’s metabolic function, for the human body health has certain benefits. Moderate consumption of foods rich in high quality protein such as beef and fish can replenish energy and protein for the body; while some iron-rich foods such as purple cabbage, black fungus and animal liver can replenish iron for the body, which is beneficial to the people after blood sampling. Blood tests should be conducted under the guidance of a physician.