If someone is on a diet, and they eat a cupcake, will something happen to them?

If someone is on a diet, and they eat a cupcake, will something happen to them?
Depends on what you are on a diet for. If you are on a diet to control your blood sugar, I'd avoid it. It won't kill you, but it won't help either. If you are on a diet to loose weight, one in a week won't matter. The key here is it is a high carb and will zoom through your system and tell it you want more. First the cupcake, then the whole bakery aisle. Look for a tasty low carb calorie conscious food. You'll feel better in the long run.
you die
Not for only one. Good luck.