What are the benefits of donating blood?

Scientific blood donation does not harm health.

From the perspective of blood physiology: what is the concept of donating 200 ml of blood? The total amount of human blood accounts for about 8% of the body weight, and the total amount of blood of ordinary adults is 4000-5000 ml, while 200 ml of blood donation only accounts for1/20-1/25 of the total amount of blood; In clinical medical practice, blood transfusion is generally not recommended for those whose blood loss is below 600 ml. It can be seen that donating 200 ml of blood will never affect health.

Not all the blood in the human body participates in blood circulation. 20-25% of blood is stored in "blood banks" such as spleen, liver, lung and skin. Spleen is the largest "blood bank" of human body, which can store 20% of the total blood volume of human body. When blood is needed for human blood circulation, the spleen will continuously release blood into blood vessels and participate in blood circulation. Donating 200 ml of blood does not affect blood circulation, how can it affect health? Blood components in the human body are very active. About1120 red blood cells (that is, 2 billion red blood cells) age and die every day. The average life span of white blood cells is about 7- 14 days, and the life span of platelets is even shorter, about 7-9 days. In addition, human bone marrow has a powerful compensatory function. Under certain conditions, the hematopoietic function of bone marrow can be improved to 6-8 times of normal. A healthy person produces about 200 billion red blood cells and 654.38+02 billion platelets every day, which means that each healthy adult's new blood cells are equivalent to the total amount of human blood cells every year. After donating 200 ml of blood, the human body will be replenished soon, and it will never affect health.

Donating blood has many benefits.

A lot of scientific research has proved that blood donation is good for health.

First, it can prevent and relieve hyperviscosity.

Scientists have studied the relationship between blood and blood donation by using hemorheology and hemodynamics, and found that adhering to long-term moderate blood donation, especially donating tangible components such as red blood cells and platelets, can obviously reduce blood viscosity, speed up blood flow and increase cerebral blood flow, thus alleviating or preventing hyperviscosity, making people relaxed, clear-headed and energetic.

Second, it can prevent and reduce the occurrence of cardiovascular and cerebrovascular diseases.

An expert in Qingdao made a comparative study on hemorheology of 127 repeated blood donors, 87 hypertensive patients and 60 ischemic stroke patients. The results show that blood donors have a positive effect on reducing the occurrence of cardiovascular and cerebrovascular diseases. A research team in Finland investigated 278 men aged 42-60 years. Five years later, the proportion of blood donors suffering from coronary heart disease was 86% less than that of non-blood donors. Another study followed up 1532 people who donated blood L-2 times. Results Only one person had acute myocardial infarction, and the incidence rate was 0.043%. Among 2306 people who didn't donate blood in the same period, 226 people developed acute myocardial infarction, the incidence rate was 9.8%, which was significantly higher than that of the blood donation group. A study by a cardiovascular disease research group in the United States also shows that within three years, the risk of cardiovascular disease of blood donors (men) is only 1/2 of that of non-blood donors.

Third, male blood donation can reduce the incidence of cancer.

Too low iron content in the body is prone to iron deficiency anemia and bradykinesia, while too high iron content is counterproductive. International Cancer once reported that if the iron content in the body exceeds 10% of the normal value, the probability of cancer will increase, and proper blood donation can prevent cancer. The article also mentioned that women lose a certain amount of iron due to blood loss during menstrual cycle, so there is no obvious relationship between iron content in women and cancer.

Fourthly, it can promote and improve mental health.

A large number of studies show that healthy emotions can communicate with the brain and other tissues and organs through the nervous system, body fluids and endocrine system, so that they are in a good state, which is conducive to the enhancement of human immunity and resistance. Blood donation is a noble character to save lives. While helping others and being kind to others, it also purifies one's spirit, soothes one's soul and enriches one's work and life. Doing good by virtue actually helps others and yourself, which is an important element of health and longevity.

Fifth, it can prolong life.

Foreign scholars also made a prospective comparative study of 332 people over 66 (blood donors) and 399 people of the same age and sex (non-blood donors). The results show that:

The average life expectancy of blood donors is 70. 1 year, which is higher than that of non-blood donors (67.5 years).

The survival rate of blood donation group was 67%, which was higher than that of non-blood donation group (40%).

The mortality rate of blood donation group was 33%, which was lower than that of non-blood donation group (60%).

China's "Blood Donation Law" stipulates that unpaid blood donors are exempt from blood collection, storage, separation, inspection and other expenses when they need blood clinically; The spouses and immediate family members of unpaid blood donors may, in accordance with the provisions of the people's governments of provinces, autonomous regions and municipalities directly under the Central Government, waive or reduce the fees prescribed in the preceding paragraph when using blood for clinical purposes.