If not enough carbohydrate is consumed to maintain blood glucose levels for the brain, nervous system, and developing red blood cells the breakdown of glycogen for glucose results in a loss of water, which many interpret as weight loss. (fitnessandpower.com)
This hormone inhibits the uptake of glucose by muscle and other cells and promotes the breakdown of glycogen in the liver in order to release glucose into the blood. (strengthtrainingendeavors.com)