Definition & Meaning of "glycogen"

What is "glycogen"?

Glycogen is a type of carbohydrate that serves as a storage form of energy in animals and humans. It is made up of many glucose molecules linked together in a branching structure. Glycogen is primarily stored in the liver and muscles, where it can be broken down into glucose when energy is needed. This process, known as glycogenolysis, helps maintain stable blood sugar levels and provides a quick source of energy during periods of increased activity or when food intake is limited. Glycogen also plays a role in regulating blood sugar levels and supporting overall metabolic function.