How?
Studies have shown that, in general, most people tend to consume more iron on a daily basis than is necessary for good health. Ingestion of quantities of iron beyond a certain quantity can promote formation of free radicals in the body. Free radicals have justly earned their reputation for causing cellular changes which can disrupt normal cell function and increase the risk of certain chronic diseases such as heart disease and cancer. This is more likely to be a problem for men and post menopausal women since women of child bearing age shed excess iron through regular menstrual cycles. If a person happens to be a red meat eater, the risk for iron overload can be even higher.
How does blood donation help with iron overload?
Blood donation removes some of the excess iron which can cause free radical formation in the body. In fact, studies have shown that men who donate blood on a regular basis have a lower risk of heart disease. With heart disease being the number one cause of death in males, this is, indeed, an important health benefit of donating blood.
How can you be sure you’re not giving away too much iron? Before you’re allowed to donate blood, your hemoglobin level, a rough measure of your iron levels, will be checked. If it’s deemed too low, you won’t be allowed to donate that day. Your hemoglobin level will be monitored closely every time you present for donation and you’ll only be allowed to donate every eight weeks to prevent too much iron from being removed from your body. It’s a free and easy way to keep track of your iron levels. When you consider the potential health benefits of giving blood along with the joy of giving to others in need, it’s no wonder the donation of blood has become so popular. An hour spent relaxing in a chair every two months is all it takes to benefit both your health and the health of the recipient. (Source: http://www.healthmad.com)
Parallelism: Spiritual Health Benefit
While giving blood helps remove excessive iron in our body which in turn is advantageous to our physical well-being, the primary benefit is actually on our spiritual health. An enormous feeling of being able to give to someone who needs it is satisfying, but, fulfilling one of God's greatest commandment is something that would give us an unexplainable feeling. Being able to follow our Lord Jesus Christ's example is spiritually rewarding, but most of all, we are able to acquire the greatest love of any man can possessed (John 15:13).
Acquiring the greatest love of all enriches our spirit and soul, or rather, donating blood enriches our spirituality. So in turn, blood donation enhances not only our physical health but also our spiritual health.
Above all, we are pleasing God every time we give our life to our fellowmen. You can just imagine if we give our life(blood) not only once but several times (or every blood donation drive).
How many times can we make our God happy?