Will blood donation cause harm to my health?

Blood donation does not cause any ill effects on the human body and is 100% safe. To understand this let us go a little into body physiology. The total amount of blood circulating in our body's cardiovascular system is about 5 liters. Of this amount, only about 350 ml. is bled from the body during blood donation. The human body replenishes this amount of blood donated within about 48 to 72 hours of donation. Thus there is no harmful effect to health due to blood donation.