Blood doping is the process of increasing the Red Blood cells by administration of blood transfusion. Increased amount of RBCs helps in strength and endurance activities. This can be done by injecting extra RBCs production. Blood doping increases the amount of hemoglobin in the blood stream. Hemoglobin is an oxygen carrying protein in the blood. So increase in hemoglobin allows higher amount of oxygen to reach and fuel an athlete’s muscles, which increases stamina and performance particularly in long distance events such as running and cycling.