"The Development of Human Insulins
Up until the 1980s, all available insulins were made from animal pancreas extracts (mainly from cattle and pigs). These insulins helped millions of people live longer, healthier lives, however they weren’t perfect. They were complex to produce and triggered allergic reactions in some patients.
A new biotechnology developed in the early 1970s paved the way for the next generation of insulins. Scientists working at the insulin manufacturer Eli Lilly began experimenting with genetic engineering. Before long, they successfully created an insulin identical to the kind produced in the human body. In late 1982, the company received FDA approval for their new ‘human insulin,’ Humulin. This milestone in the history of insulin made the therapy safer and even more accessible."
you have a frustrating lack of curiosity
no one "invented" insulin. Insulin is a naturally occurring substance. Whomever wrote "The inventor of insulin died," is the idiot.
