What is ketosis?

Ketosis is best understood as a metabolic state in which the body shifts its primary energy source from carbohydrates to fats. When carbohydrate intake is significantly reduced, the body begins to break down fatty acids into ketones, which serve as an alternative fuel source for many tissues and organs, particularly the brain. This transition is crucial for individuals engaging in very low-carbohydrate diets or fasting.

In this state, the production of insulin decreases, which enables the body to access fat stores more readily. This metabolic adjustment plays a fundamental role in weight loss strategies and managing certain health conditions, such as epilepsy.

The other options do not accurately describe ketosis. For example, a state where the body stores fat or a condition marked by high insulin levels do not reflect the active fat-burning nature of ketosis. Additionally, a process that increases carbohydrate intake contradicts the very essence of achieving ketosis, as it requires the reduction of carbohydrates to elevate ketone production.