Blood donation is the voluntary process where a person has blood drawn to be used for transfusions. It can save lives. The Quran encourages saving lives. Most healthy people between ages 17-65 who weigh at least 110 pounds can donate blood if they have a balanced diet and are generally healthy, though those with certain medical conditions cannot. There are different types of blood donors including voluntary unpaid donors and donors who are replacing blood for themselves or others. Donating blood provides health benefits like reducing heart disease risk and burning calories.