I am worried that donating marrow will affect my health. In fact, this kind of worry is unnecessary. First, the total amount of human blood accounts for 8% of body weight, and donating 600 grams of plasma (including anticoagulant) will not affect the normal physiological function of blood. Second, the human body itself has a strong regulatory function, and the blood volume will recover after donating blood 1 ~ 2 hours.