This document discusses ketosis and ketoacidosis, two conditions related to high levels of ketones in the blood. Ketosis occurs when the body burns fat for energy instead of carbohydrates, causing ketones to be produced and excreted in urine, but at levels that are not dangerous. Ketoacidosis is a serious condition where ketone levels become too high, upsetting the body's acid-base balance and requiring emergency treatment to prevent complications like coma or death if left untreated. The document provides sources for further information on these conditions.