My girlfriend spent a couple of years in a lab that studies blood factors in aging -- parabiosis was an important aspect of their methodology. A couple of note

My girlfriend spent a couple of years in a lab that studies blood factors in aging -- parabiosis was an important aspect of their methodology. A couple of notes: 1) Parabiosis does not refer to infusions of young blood. Parabiosis specifically refers to the surgical joining of two organisms. This technique is employed in young blood experimentation because the amount of blood that must be exchanged to achieve substantial results would be impractical via transfusion. 2) Young blood research, having established that blood factors in aging do, in fact, exist, currently focuses largely upon isolating and reproducing those factors. While the desperate may pursue actual young blood transfusions -- which, recall, are incapable of providing enough blood to achieve a material result, and are fraught with other risks -- the product that is eventually brought to market will, presumably, be synthesized in a chemical plant.