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K

Term Definition
Ketone or Ketone Bodies

A ketone is an intermediate product of the breakdown of fats in the body; any of three compounds (acetoacetic acid, acetone, and/or beta-hydroxybutyric acid) found in excess in blood and urine of persons with metabolic disorders. Ketones are used as a measure of metabolic instability in patients with propionic acidemia.

Ketosis

A pathological increase in the production of ketone bodies. Ketosis is a stage in metabolism occurring when the liver has been depleted of stored glycogen and switches to a fasting mode such as occurs during sleep, during dieting, and during the body's response to starvation. In propionic acidemia, a measure of metabolic instability.

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