Is blood donation dangerous?

Donating 450 ml of blood will not harm a healthy person, since such a small blood loss (and this is about 12%) will not disrupt the functioning of the body. In addition, the volume of blood will be restored fairly quickly. On the contrary, doctors say that in those who donate blood regularly, blood formation is activated and resistance to stress increases. According to observations, donors are less likely to suffer from cardiovascular diseases, they have increased immunity.