I’ll type that bit of the book for you.
It’s attributed to the fact that people eating very low carb diets are burning ketones some of which are eliminated via the lungs. Dieters believe it’s something they have to learn to live with. Wrong (I’m paraphrasing a bit here).
Some people advocate drinking more water or use breath mints or brushing your teeth. None of those things will work because it comes from your lungs not your mouth.
That supposed ketobreath is not coming from burning fat. It’s almost always from eating too much protein. Low carb dieters tend to overdo the protein than what it should be which is a high fat diet.
If you detect also a strong ammonia smell in your urine, this is a sign too.
So she says what needs to be done is cut down on the protein a bit.