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A few of the points stood out to me. However, GLP-1 receptors are present in a far wider range of organs, which suggests additional weight-loss mechanisms are likely still waiting to be identified. The question of why GLP-1 drugs can improve health independently of weight loss resists tidy explanations and leaves researchers puzzled. I have not encountered any other medical story in which scientists so often find themselves apologizing for how confusing their findings look. Every effect they investigate leads them toward a different account of how these drugs deliver benefits. Sometimes GLP-1s appear to act directly on the organs tied to particular diseases, improving their health. In other instances, the drugs assist the body in managing blood sugar and fat, which makes people “more metabolically flexible” and “biochemically more youthful,” according to Dr. DiMarchi. Among the most puzzling and intriguing mechanisms is their action on inflammation.
Inflammation forms part of the body's built-in reaction to injury and infection. It can be a sign of healing, yet in chronic disease it may also be present and cause harm. At the University of Toronto, Dr. Drucker's lab has shifted away from researching chronic conditions such as diabetes and obesity toward deciphering how GLP-1s affect the immune system. “We realized very quickly one underlying theme of all these was inflammation,” he said, referring to those diseases.
