Postabsorptive state

Definition

The postabsorptive state is a metabolic phase in which the body, having finished digesting and absorbing nutrients from a meal, relies on internal energy stores to supply its energy needs. During this state, typically occurring 4 to 6 hours after eating, the body's focus shifts from storing energy to mobilizing stored nutrients for continuous supply.

Related terms

Glycogenolysis: The breakdown of glycogen into glucose molecules to provide energy during periods when food intake is not supplying glucose directly.

Gluconeogenesis: A metabolic pathway that results in the generation of glucose from certain non-carbohydrate carbon substrates like proteins and fats, especially important during the postabsorptive state.

Lipolysis: The process of breaking down lipids (fats) into free fatty acids and glycerol, providing additional sources of fuel when dietary calories are not available