Some nutritionists are saying red meat is good to eat but can leed to too much iron due to lack of bleeding.
Also donating blood temporarily causes about 1 lb of weight loss and lower blood pressure.
For people genetically disposed to excess iron, periodic blood letting is prescibed.
http://en.wikipedia.org/wiki/Iron_overload
from wiki: “Routine treatment in an otherwise-healthy person consists of regularly scheduled phlebotomies (bloodletting). When first diagnosed, the phlebotomies may be fairly frequent, perhaps as often as once a week, until iron levels can be brought to within normal range. Once iron and other markers are within the normal range, phlebotomies may be scheduled every other month or every three months depending upon the patient’s rate of iron loading.”
I don’t think most people have that problem.