Frederick Grant Banting.

Photograph of Frederick Grant Banting (1891–1941) was a Canadian physician who received the Nobel Prize in Physiology or Medicine in 1923, along with John James Rickard MacLeod, for being the first to extract insulin from the pancreas. This advancement allowed insulin to be collected from animal glands and used to treat people with diabetes. He and colleagues partnered with pharmaceutical companies to mass produce insulin.. (Photo by: Universal History Archive/Universal Images Group via Getty Images)