In 1920, a Canadian physician and scientist named Frederick Banting began working on an idea to isolate and extract insulin. He worked in the laboratories of J.R.R. McLeod, a professor of physiology at the University of Toronto. The medical student Charles Best aided him in his work to test out insulin on dogs. Chemist James Collip worked with Banting and Best to purify and refine insulin for clinical trials in humans. On January 23rd, 1923, Banting, Best, and Collip were awarded the American patents for insulin. They sold the patent to the University of Toronto for $1 each. Banting notably said: "Insulin does not belong to me, it belongs to the world." His desire was for everyone who needed access to it to have it.

In 1920, a Canadian physician and scientist named Frederick Banting began working on an idea to isolate and extract insulin. He worked in the laboratories of J.R.R. McLeod, a professor of physiology at the University of Toronto. The medical student Charles Best aided him in his work to test out insulin on dogs. Chemist James Collip worked with Banting and Best to purify and refine insulin for clinical trials in humans. On January 23rd, 1923, Banting, Best, and Collip were awarded the American patents for insulin. They sold the patent to the University of Toronto for $1 each. Banting notably said: "Insulin does not belong to me, it belongs to the world." His desire was for everyone who needed access to it to have it.