# Glycogen --- **Glycogen** is a polymer of [[glucose]] that we like a lot. It's a very complex structure that we store in our [[liver]] and [[muscle tissue]]. All monosaccharides travel to the liver once they are digested, and if we actually have enough glucose in our bloodstream, then the liver starts complexing the glycogen. Glycogen can also be stored in the [[muscle tissue]]. ![[glycogen.png]] Some glycogen is stored in the [[liver]] (~100g), but for a lot more is actually stored in the [[muscle tissue]] itself (~500g). The body typically has enough glycogen stored to last about 1-2 days, after which, if needed it can take energy from fats in [[adipose tissue|adipose cells]] or [[muscle tissue]], or by converting proteins or other materials into glucose. The total amount of glycogen in the muscle is nearly always 2 to 3 times greater than the amount in the liver. ## Glycogenesis & Glycogenolysis **Glycogenesis** is the creation of glycogen. It is made out of [[glyceraldehyde 3-phosphate|glyceraldehyde phosphate]], an intermediate of glycolysis. It is triggered when there is an excess of [[blood glucose]]. **Glycogenolysis** is the breakdown of glycogen. It occurs regularly when we enter a [[fasting state]]. ___