Glycogen

Glycogen is a polysaccharide and is the form in which carbohydrates are stored in the body. When the body requires energy, glycogen is broken down into glucose molecules.

It is a branched polysaccharide similar to amylopectin, and is formed from many glucose molecules bound by alpha-1,4 glucoside bonds in the linear portion and by alpha-1,6 bonds at the branching points. Above all, it is stored in the liver and skeletal muscle.