Ketoacidosis is an acidification of the blood, which can occur due to an excessive concentration of ketone bodies in the blood. The reason for an increased production of ketone bodies is, for example, a lack of insulin. As a rule, ketoacidosis only occurs in diabetes mellitus type 1, since in this case there is an absolute lack of insulin. The consequences can be a ketoacidotic coma, acetone odor in the breath and dehydration. Ketoacidosis is fatal if left untreated.