What is ketosis?

Ketosis is a metabolic state characterized by an increased concentration of ketone bodies, which are produced when the body relies primarily on fat for energy instead of carbohydrates. This process typically occurs when carbohydrate intake is significantly reduced, prompting the liver to convert fatty acids from stored fat into ketones. These ketones then serve as an alternative energy source for various tissues, including the brain.

The option focusing on high ketone body concentration due to fat metabolism accurately captures this definition of ketosis, highlighting the physiological shift in energy production. In contrast to this, other choices describe different conditions that do not reflect the essence of ketosis, such as excessive glucose metabolism or high glucose levels due to uncontrolled diabetes, both of which indicate a reliance on carbohydrates rather than fat.