Why telling people with diabetes to use Walmart insulin can be dangerous advice

About 7.4 million people in the U.S. require manufactured insulin to stay alive. I’m one of them. I’ve lived with Type 1 diabetes for over 15 years and inject two kinds of insulin every day. These insulins are notoriously expensive, and even with health insurance, people with diabetes regularly struggle to make ends meet....
https://theconversation.com/why-telling-people-with-diabetes-to-use-walmart-insulin-can-be-dangerous-advice-125528