11 January 1922 Posted on January 10, 2013 by Staff Insulin is first used to treat diabetes in a human patient. Famous Words of Inspiration..."Only cowards insult dying majesty." Aesop — Click here for more from Aesop Related posts: 11 January 1922 15 June 1752 7 April 1922 28 October 1922 6 January 1941 21 January 1999