Delivery I believe, it takes a while to get absorbed from where you inject it and spread around. You can speed this up by exercising the area it was injected in

Delivery I believe, it takes a while to get absorbed from where you inject it and spread around. You can speed this up by exercising the area it was injected into or even a hot shower to increase blood flow. There is also a new faster acting inhaled insulin, afrezza, but that won't work with the pumps discussed here.