But HGH being a kind of antagonist of insulin, is trying to reduce the use of cell glucose and force her to eat fatty acids. To do this, it embeds itself in the membrane of fat cells and serves as transport system that takes them from fatty acids, bringing them into blood, and gives them oxygen. In other words, it turns the process of lipolysis, i.e. reducing the number of fat cells. And most importantly, no HGH fat cells just will not give up its contents and not be destroyed. But if the cells of the body will need more fatty acids, and the breakdown of fat cells under the action of growth hormone increase, and the mobilization of fat from deposits will increase, which will lead to weight loss. If you really want to summarize, the body just starts to eat its own fat. And for this, first and foremost, you need a sufficient amount of growth hormone.