This is a complete introduction and explanation of all the different insulins currently available. Part 1 explores long acting, or basal insulins. Part 2 (separate video) explores fast-acting, or bolus insulins. In this video, we learn all about NPH, Lantus, Levemir, Basaglar, Toujeo, and Tresiba. I explain how each insulin works and we discuss their place in diabetes management.