Dr. Sean O’Mara, COL(R), MD, JD, is a physician, researcher, retired U.S. Army Colonel, and executive biological consultant specializing in health and performance optimization. His unusually diverse career has included work as a police officer and undercover narcotics agent, criminal prosecutor, emergency medicine physician, and military physician, experiences that shape his highly pragmatic approach to human performance. For more than 13 years, Dr. O’Mara has focused on identifying and eliminating visceral fat, epicardial fat, and intramuscular fat, using advanced imaging to objectively measure changes in body composition and metabolic health. Today, he works with high-performance leaders—including executives, entrepreneurs, public figures, and senior political leaders—to help them become more optimized biologically, cognitively, and physically through natural, evidence-based strategies. His work challenges conventional ideas about aging and chronic disease by showing people what is happening inside the body, not simply what appears on the outside, making the science of metabolic health both visible and difficult to ignore.