In experiments performed on mice, blood transfusions from young mice reversed age-related markers in older mice. The protein involved is identical in humans.
http://mic.com/articles/88851/harvard-scientists-may-have-just-unlocked-the-secret-to-staying-young-forever
Here:
http://www.ncbi.nlm.nih.gov/pubmed/24793238
http://www.ncbi.nlm.nih.gov/pubmed/24797482
I hit a paywall, but found the full text here:
https://web.stanford.edu/group/twclab/cgi-bin/images/TWClab/publications/2014_villeda_natmed.pdf
In experiments performed on mice, blood transfusions from young mice reversed age-related markers in older mice. The protein involved is identical in humans.
http://mic.com/articles/88851/harvard-scientists-may-have-just-unlocked-the-secret-to-staying-young-forever