Yonghyun Yoon, MD, is an orthopedic surgeon and director of the Incheon Terminal Orthopedic Surgery Clinic in Incheon, Republic of Korea. His clinical and academic work focuses on non-operative musculoskeletal medicine, ultrasound-guided diagnosis and interventions, prolotherapy, hydrodissection, and extracorporeal shockwave therapy. He is affiliated with the International Association of Regenerative Medicine and is involved in educational activities in regenerative musculoskeletal medicine. His research interests include micronutrient biology, neurovascular-metabolic regulation, nutritional neuropathy, peripheral nerve health, inflammation, and tissue repair. He has contributed to clinical and translational research on ultrasound-guided procedures, regenerative injection therapy, and the integration of nutritional and metabolic approaches into musculoskeletal pain management, functional recovery, and neuropsychiatric vulnerability.