1921

In July, Banting and Best inject liquid extract of degenerated pancreas (“isletin”) into a diabetic dog whose pancreas had been surgically removed and had their first success on August 3 (Bliss, 66-67). Jan 11, 1922: first formal test of B&B’s extract with a human diabetic, which failed (79-80); Jan 23: first successful test on same patient with Collip’s purified extract (82).