A preliminary one-page communication regarding the isolation of insulin, made to a meeting of the American Physiological Society in December 1921. Digital facsimile from insulin.library.utoronto.ca at this link.

In 1923 Banting and Macleod were awarded the Nobel Prize in Physiology or Medicine "for the discovery of insulin." Banting was only 32 years old at the time. When I wrote this note in 2017 Banting remained the youngest person to receive the Nobel Prize for Physiology or Medicine. See also Nos. 1205, 3967 and 3968.