Re: urine protein and ketones
The Atkins diet - or any kind of a high-protein diet - would cause this. Your body will produce excess ketones that will be excreted in your urine and also your breath. Which is why people on these kinds of diets have bad breath that they're not aware of. It's not harmful for a short period of time, but you would not want to stay on a diet like this for an extended length of time.