From what I understand, Ambrosia is transfusing plasma, not whole blood.<p>There are a number of studies, going back many years, suggesting that young blood has a rejuvenating effect in older animals.<p>I have been using bone marrow mesenchymal stem cells to develop therapies for stroke and other forms of neural injury for more than a decade. What is particularly striking, is the effect of age upon these cells is quite obvious, both in vitro and therapeutically. In our own work, we found that when we treated stroked older animals with syngeneic MSCs from younger mice, they recovered much better than if they were treated with aged-matched MSCs.<p>What is even more interesting IMO, is that a couple of groups have reported that transplantation of young-to-old bone marrow, or just young-to-old MSCs significantly extends lifespan in mice. <a href="http://www.ncbi.nlm.nih.gov/pubmed/23967009" rel="nofollow">http://www.ncbi.nlm.nih.gov/pubmed/23967009</a> <a href="http://www.ncbi.nlm.nih.gov/pubmed/22355586" rel="nofollow">http://www.ncbi.nlm.nih.gov/pubmed/22355586</a><p>Based on the value of preserving your own autologous bone marrow stem cells, and their potential to be used in self young-to-old rejuvenating transplantation, I co-founded <a href="https://foreverlabs.com" rel="nofollow">https://foreverlabs.com</a>. In short, we cryopreserve your own bone marrow stem cells, to be used later in life. It's much like cord blood stem cell storage, but for adults.<p>The blood is born out of the bone marrow. Furthermore, the bone marrow cells (including MSCs) produce many soluble factors (proteins, cytokins, microvesicles, non-coding RNAs, etc.) that can significantly alter the blood profile. Thus, there is reason to believe that the parabiosis or the 'young blood effect' could be conferred by rejuvenating the bone marrow niche. Indeed, we this might be happening in the studies cited above.<p>We just launched our own version of a young-to-old bone marrow stem cell transplantation study in mice. It is our goal to better understand and optimize the young-to-old bone marrow transplantation effect, and to eventually offer the ability for our clients to donate their own younger bone marrow to their older selves (in addition to providing a store of young cells for other potential therapies).<p>There is much work to be done, but IMO there is real opportunity for a health-maintenance approach to medicine, and this is one of them. Disease treatment will not long remain as the most rational or economical approach to healthcare.