The secret of eternal youth...?
In the 1920s, a Vienna doctor called Steinach claimed he could rejuvenate old men.
Available since: Mon 17 Feb 2014
This clip is from
John Wass presents a documentary telling the story of how hormones were discovered.
First broadcast: 26 Feb 2014
Explore BBC Four’s new season, examining bodies like never before. Starts Tue 18th Feb.