Frederick Banting upon the idea of obtaining insulin from the fetal pancreas. He removed the pancreases from fetal calves at a William Davies slaughterhouse and found the extracts to be just as potent as those extracted from the dog pancreases. By December 1921, he had also succeeded in extracting insulin from the adult pancreas. Pork and beef would remain the primary commercial sources of insulin until they were replaced by genetically-engineered bacteria in the late 20th century. In spring of 1922, Banting established a private practice in Toronto and began to treat diabetic patients. His first American patient was Elizabeth Hughes Gossett,
William Banting is still available on-line. The popularity of the pamphlet mentioned above was such that the questions "Do you bant?" or "Are you banting?", still occasionally in use today, refer to his method, and sometimes even to dieting in general. In Sweden "banta" is still the main verb for "being on a diet". Scientist Tim Noakes popularised Banting in South Africa when he named his high-fat, low-carbohydrate diet after Banting. Gary Taubes' study of carbohydrates, "Good Calories, Bad Calories", begins with a prologue entitled "A brief history of Banting" and discusses Banting at some length. Discussions of low-carbohydrate diets often begin