Is it the body actually producing more insulin, because it thinks you've consumed sugar, and if so does it cause a drop in blood sugar? I would assume that with an actual metabolic response like that (if that's the right lingo to use) that a person in that situation couldn't just ignore the desire to eat and would have to, or risk facing tangible negative consequences (i.e. low blood sugar, in this case, and possibly eventual insulin resistance?). Not sure I understand the whole mechanism very well.