ketones from breathing

It is usually produced in very low carbohydrate diets, by removing ketones from breathing. It is solved by increasing carbohydrates and relieving them with more frequent oral hygiene.

If we talk about weight loss, yes, it is. But not more than other types of hypocaloric and less restrictive diets. In various studies, the efficacy of ketone diet has been tested with no ketone-generating diets to lose weight and found that both have a similar effect on weight loss if they have such high calorie intake. See More at https://fitcrasher.com/dietonica/