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Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals and fungi. The polysaccharide structure represents the main storage form of glucose in the body.or the next 8â12 hours, glucose derived from liver glycogen is the primary source of blood glucose used by the rest of the body for fuel. Glucagon, another hormone produced by the pancreas, in many respects serves as a countersignal to insulin.
What is Glycogen? When we eat carbohydrates, our body changes it into a form of sugar called âglucoseâ that can be used for energy. The glucose, in turn, is changed to Glycogen, a form of sugar that can be easily stored by our muscles and liver. It is the predominant storage form of glucose and carbohydrates in animals and humans. While glycogen is indispensable to athletes, we have a very limited capacity to store it. For example, carbohydrates account for only about 1-2% of total bodily energy stores 1. Most of this is stored as glycogen in muscle (80%) and liver (14%), and about 6% is stored in the blood as glucose. Despite its limited storage capacity, glycogen is crucial for energy production at all levels of effort. At rest, muscle glycogen is used for about 15-20% of energy production.