A large number of scientific studies have proved that blood donors not only contribute their love to the society, but also improve their physical condition and make "investment" for their health.
Scientists used hemorheology and hemodynamics to study the relationship between blood quality and blood donation. It is found that regular and moderate blood donation, especially a single donation of tangible components such as red blood cells and platelets, can significantly reduce blood viscosity and increase cerebral blood flow after speeding up blood flow, thus alleviating or preventing hyperviscosity, making people feel relaxed, clear-headed and energetic.
Blood donation also plays a positive role in reducing the occurrence of cardiovascular and cerebrovascular diseases. A research team in Finland investigated 2682 men aged 42-60. Among them, the proportion of people who donate blood at least 1 time in two years who have acute myocardial infarction in five years is 86% lower than those who don't donate blood. A study by a cardiovascular research group in the United States also shows that within three years, the risk of cardiovascular disease among blood donors (men) is only half that of non-blood donors.
Male blood donation can also reduce the incidence of cancer. International Cancer reports that if the iron content in the body exceeds 10% of the normal value, the probability of cancer will increase. Proper blood donation can regulate the iron content in the body and prevent cancer. The article also mentioned that young and middle-aged women lose a certain amount of iron in their bodies due to menstrual blood loss, so the iron content in these women has no obvious relationship with the occurrence of cancer.
Studies have shown that people who donate blood regularly are less prone to aging than those who don't donate blood, and have strong tolerance and self-regulation function in unexpected situations. Some scholars have 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 showed that the average life expectancy of the blood donation group was 70. 1 year, which was higher than that of the non-blood donation group (67.5 years). Once an accident happens, the survival rate of the blood donation group is 67%, which is higher than that of the non-blood donation group (40%). From the above analysis, the life expectancy of blood donors will be prolonged because their blood metabolism is more vigorous than that of non-blood donors.
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. Blood donors are in the best mood while helping others and being kind to others, which is beneficial to their health.
Male blood donation has many advantages.
Some studies believe that if middle-aged men donate 550 ml of blood every year, the risk of heart disease will be reduced by 86%. According to this study, when men are over 40 years old, due to the reduction of physical activity and the improvement of living standards, body fat tends to accumulate, and many people's blood lipids are at a high level for a long time. Regular blood donation can reduce the viscosity of blood, which also reduces the hidden danger of arteriosclerosis.
International Cancer reports that when the iron content in human body exceeds 10% of the normal value, the probability of cancer will increase, and the incidence of cerebral thrombosis and myocardial infarction will also increase. Proper blood donation, especially for men, can increase the iron content of red blood cells in the blood. The content of iron in donated blood will be reduced appropriately, reducing the occurrence of the above diseases.
Through a large number of investigations, scientists have found that young women are less likely to suffer from stroke, heart disease and tumor than men, but the chances of suffering from these diseases will increase with age. Through the analysis of the reasons, it is believed that the reduction of monthly menstrual flow of young and middle-aged women accelerates the metabolism of red blood cells, promotes bone marrow hematopoiesis, increases the number of newborn red blood cells in the blood, and transports more oxygen and nutrients to all parts of the body, thus reducing the risk of heart disease.
The total blood volume of an adult is about 4000-5000 ml. The weight standard for blood donation is 50 kg for men and 45 kg for women. A person donates 200-400 ml of blood at a time, accounting for only 5%- 10% of the total blood volume. In addition, blood drawn from peripheral blood vessels will automatically release blood originally stored in internal organs such as spleen and liver into blood vessels to maintain a constant blood volume, and the water and inorganic substances lost after blood donation will be replenished within 1-2 hours. Plasma protein can be replenished in a day or two; Platelets, white blood cells and red blood cells will soon return to their original levels. So donating blood will not affect the health of blood donors.
Therefore, healthy people donate blood according to regulations, which will have no effect on the body. After blood donation, the hematopoietic tissue of the human body will automatically accelerate hematopoiesis, and generally it will return to its original level after half a month. It is necessary to supplement nutrition properly after blood donation, but there is no need to eat and drink. Appropriately increase nutrition and provide enough raw materials for blood production, focusing on protein, iron, vitamin B 12, folic acid, etc.
It is worth reminding that if a large number of supplements are inactive, it will not be conducive to the digestion and absorption of nutrients, leading to gastrointestinal dysfunction and obesity due to excess calories.
High iron content in human blood will obviously increase the risk of heart disease, and proper blood donation can greatly reduce the iron content in blood.
It won't do any harm to donate blood in moderation, protect the puncture hole after blood donation and supplement nutrition properly.
Benefits:
First, proper blood donation can reduce the viscosity of blood.
When blood viscosity is at a high level, proper blood donation, especially the tangible components in blood, can effectively reduce blood viscosity and prevent many diseases.
Second, regular blood donation by men can prevent cancer.
British scientists have found that male blood donation can prevent cancer, because blood contains a lot of iron, and high iron content in human body will promote cancer. Regular blood donation can effectively reduce the content of hemosiderin in blood, so regular blood donation by healthy men can get the effect of cancer separation.
Third, middle-aged people can live longer by donating blood.
When people reach middle age, most of them have successful careers, good economic conditions, delicious food and rich nutrition. If they are not careful, it will lead to overnutrition, fat accumulation and obesity, especially for middle-aged people who are engaged in non-manual labor. If we do not pay attention to the adjustment at this time, blood iron, blood lipid and other indicators will exceed the standard, blood viscosity will increase, atherosclerosis and so on, thus inducing cardiovascular and cerebrovascular diseases such as hypertension, coronary heart disease, cerebral thrombosis and cancer.
Blood donation can reduce all components in blood, especially iron and protein. It can also reduce blood viscosity and accelerate blood flow. Healthy middle-aged people can stimulate hematopoietic organs such as bone marrow to maintain vigorous hematopoietic state under the guidance of doctors, continuously increase the proportion of young red blood cells in the blood, improve the body's immunity and disease resistance, prevent diseases and prolong life.
Those people are not allowed to donate blood;
STD, leprosy and AIDS patients and HIV-infected people.
Hepatitis patients, hepatitis B surface antigen positive, hepatitis C antibody positive.
Patients with allergic diseases and recurrent allergic attacks, such as recurrent urticaria, bronchial asthma and drug allergy (blood donation is not allowed for simple urticaria in acute attack).
Various tuberculosis patients, such as tuberculosis, renal tuberculosis, lymphoid tuberculosis, bone tuberculosis, etc.
Patients with cardiovascular diseases, such as various heart diseases, hypertension, hypotension, myocarditis and thrombophlebitis.
Patients with respiratory diseases, such as chronic bronchitis, emphysema, bronchiectasis with pulmonary insufficiency.
Patients with digestive system and urinary system diseases, such as severe gastric and duodenal ulcer, chronic gastroenteritis, acute and chronic urinary tract infection, nephrotic syndrome, chronic pancreatitis, etc.
Patients with hematological diseases, such as anemia, leukemia, polycythemia vera and various bleeding and coagulation diseases.
Patients with endocrine diseases or metabolic disorders, such as pituitary and adrenal diseases, hyperthyroidism, acromegaly, diabetes insipidus, diabetes, etc.
Organic nervous system diseases or psychosis, encephalitis, sequelae of brain trauma, epilepsy, schizophrenia, hysteria, severe neurasthenia, etc.
Leishmaniasis, schistosomiasis, filariasis, hookworm disease, cysticercosis, paragonimiasis, Keshan disease, Kaschin-Beck disease and other parasitic diseases and endemic diseases.
Patients with various malignant tumors and benign tumors that affect their health.
Those who have undergone surgery to remove important internal organs such as stomach, kidney and spleen.
Patients with chronic skin diseases, especially infectious, allergic and inflammatory systemic skin diseases, such as favus, generalized eczema and systemic psoriasis.
Patients with ocular diseases such as keratitis, iritis, neuritis, high myopia, etc.
Autoimmune diseases and collagen diseases, such as systemic lupus erythematosus, dermatomyositis and scleroderma.
People with a history of drug abuse, homosexuals, and sexual partners.
Patients with other diseases that doctors think cannot donate blood during physical examination.