Your body is fooled into thinking it detects rising blood sugars, releasing insulin. But there is no rise in sugar, which might lead to hypoglycemia. At least,

Your body is fooled into thinking it detects rising blood sugars, releasing insulin. But there is no rise in sugar, which might lead to hypoglycemia. At least, that's a plausible hypothesis. I think that has been confirmed in research, but I didn't check myself.