Free blood donation is not only good for one's health, but also good for others. But is blood donation really harmless to human body? How much is the most suitable blood donation each time?
First of all, appropriate blood donation is good for human body. Blood donation can reduce blood viscosity and prevent various diseases. Regular blood donation can effectively reduce the content of heme in blood and achieve the effect of cancer prevention. Middle aged blood donation can increase the proportion of young red blood cells in the blood, improve the body's hematopoietic function, improve the body's immunity and disease resistance, prevent diseases and prolong life. Blood donation can save other people's lives in an emergency, so it is very necessary.
But on the other hand, too much blood donation will lead to too much reduction of blood volume, which will have a greater impact on blood pressure. After blood donation, people's self resistance will decline. If they don't pay attention to rest and nutrition, they will easily suffer from anemia and other diseases. In addition, blood donation must go to a regular hospital, or they are likely to be infected with infectious diseases, liver disease and AIDS due to blood donation. Finally, the best blood donation is 200ml, no more than 400ml at most, and the blood donation interval is more than half a year before the next donation.