Glucose Disposal Agent (GDA's) primary function is to reduce the amount of insulin secreted by the body when eating carbohydrate-rich meals. They act like insulin and move glucose into muscle cells so less insulin is needed to be released by the body.
Insulin is very beneficial for carrying glucose to muscle cells, but it is also responsible for moving glucose into fat cells.
By reducing the amount of insulin secreted by the body, it will in turn help insulin receptors and aid in reducing fat. The Glucose Disposal Agent can then move glucose into muscle and keeping it away from fat cells. This leads to reduced fat gain and increased lean muscle gain.