The body obtains glucose from three main sources: the intestinal absorption of food; the breakdown of glycogen (glycogenolysis), the storage form of glucose found in the liver; and gluconeogenesis, the generation of glucose from non-carbohydrate substrates in the body. Insulin plays a critical role in balancing glucose levels in the body. Insulin can inhibit the breakdown of glycogen or the process of gluconeogenesis, it can stimulate the transport of glucose into fat and muscle cells, and it can stimulate the storage of glucose in the form of glycogen.
Type 1 and type 2 diabetes were identified as separate conditions for the first time by the Indian physicians Sushruta and Charaka in 400–500 CE with type 1 associated with youth and type 2 with being overweight. The term "mellitus" or "from honey" was added by the Briton John Rolle in the late 1700s to separate the condition from diabetes insipidus, which is also associated with frequent urination. Effective treatment was not developed until the early part of the 20th century, when Canadians Frederick Banting and Charles Herbert Best isolated and purified insulin in 1921 and 1922. This was followed by the development of the long-acting insulin NPH in the 1940s.
The emphatic takeaway is that the opposite of addiction is connection. Beating the disease is fundamentally about preempting the point where you lose the freedom to choose: Don’t hold the drink in your hand; don’t go to the party where you know exactly what will go down. In the moment before the bad decision, Brand urged, “you have to make the commitment to call someone who can be your North Star. Someone who is not spellbound in that moment. Someone who can tell you the problem you’re trying to escape is still going to be there, and it’s not going to work, and you’re gonna feel like shit afterward. This is why we need people further down the path, so they can hold our shit as we grow.”