Propionyl-L-carnitine hydrochloride is widely used in medical and therapeutic applications due to its role in improving cellular energy metabolism. It is particularly effective in managing cardiovascular conditions, such as chronic heart failure and peripheral arterial disease, by enhancing blood flow and reducing symptoms like muscle pain and fatigue. Additionally, it is utilized in treating conditions associated with mitochondrial dysfunction, as it helps optimize fatty acid oxidation and energy production. In the field of sports medicine, it is used to improve exercise performance and recovery by reducing muscle damage and oxidative stress. It also shows potential in addressing metabolic disorders and supporting cognitive health by promoting better energy utilization in brain cells.