Insulin

A lot of people are confused about how injected insulin works and how Serum insulin works.  This will explain the difference.  Serum insulin is created in the body to keep the blood/glucose as near normal as possible.  If you eat the proper foods it will keep the b/s normal most of the time and you will remain healthy.  Injected insulin is designed to bring down the b/g after a period of time.  This facility normally checks a persons b/g before meals.  There are variations in the schedule but  that is the starting point. What the doctor is aiming for is that the injected insulin will bring the b/g down to near normal by the time of the next meal.  That looks good if the patient participates and eats in such a manner that his b/g is near normal at the next meal  But in practice it leaves a lot to be desired because where the b/g was between those two periods is unknown.  How high the b/g went and how long it was there will depend upon the amount of insulin and how many carbohydrates the patient ate at and between meals. This  is the basic difference in how the injected and serum insulin works.  You could say Serum insulin works real time where injected insulin works over a period of time.