OK, but this is understandable on the basis that a low calorie diet reduces the demand on the body's ability to metabolize sugar. It's an accommodation to your diminished capacity which reduces the blood sugar level.
The article says that this diet is found to "jump-start" the body's insulin production. This is what I find puzzling.
Well, I suppose this would be more in the nature of a recovery enouraged by the relief of a stress ( excessive caloric intake ) after a breakdown, assuming that the substance of the report is true. So maybe my issue is merely rhetorical.