[crazygringo]

Not general curiosity -- but for healthier eating.

There's a theory that says you basically won't ever gain weight if you prevent your blood sugar from going above a certain level. So it's an objective way of knowing how much to eat and when.

Also, to warn when blood sugar is too low. Some people (myself included) often get so into work (or whatever) that we forget to eat, with adverse consequences. An alert is very helpful.