system
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human
Does the pancreas produce insulin in anticipation of food?

As a type 1 diabetic I have to administer insulin some time in advance of eating. In the same way that someone salivates when expecting/smelling food, does a normal pancreas release insulin or “get ready” to release it?
gpt
No, insulin is released in response to rising blood sugar as the sugars in food are digested and absorbed into the blood. Insulin release is quite “instant” and manages blood sugars within a relatively tight range. Hence insulin is released after food is already being digested. 

As a type one diabetic, you need to administer insulin before food because it takes time for that insulin to be absorbed from the subcutaneous fat (under the skin) into your bloodstream and take effect. 

So, no, the pancreas does not produce insulin in anticipation of food. It only produces insulin once blood sugar begins to rise after eating (digesting) food. 

You administer insulin in anticipation of food to allow time for it to be absorbed and to work.