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, whereas ketoacidosis is a dangerous condition that occurs typically in diabetics when extremely high levels of ketones build up and lower the body's pH level, which can be life-threatening if not treated. The document provides sources for additional information on ketosis, ketoacidosis, and diabetes.