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,
Kolej MARA Banting the number of universities that students can apply to, in 1991 the college introduced a new pre-university programme: the IB Diploma Programme. (The IB programme is recognised for admission into universities around the world.) To accommodate the growing programmes and students, a new 84-acre campus in Banting was constructed. On 1 July 1992, the new campus started operations under the name MRSM Banting with a 71 International Baccalaureate students from MRSM Cheras and 310 GCE A-Level students from MRSM Cheras and MRSM Seremban. In 1994, the name of the junior college was changed to Kolej MARA Banting (MARA College Banting)