It's much worse. The big thing with insulin is being shelf stable vs fast acting. The insulin your pancreas produces is really fast acting, but the Wal-Mart stu

It's much worse. The big thing with insulin is being shelf stable vs fast acting. The insulin your pancreas produces is really fast acting, but the Wal-Mart stuff is slow acting. With the fast acting stuff you can manage your blood sugars to a tighter degree. This might not sound like much, but over a lifetime it adds up to many fewer medical complications. It's true the Wal-Mart stuff will work in a pinch (if you know how to use it), but issuing it long term will likely take years off your life.