Palmitoyl-L-carnitine Hydrochloride is widely used in research and pharmaceutical applications due to its role in lipid metabolism. It is often employed in studies focusing on fatty acid oxidation and energy production within cells, particularly in muscle and cardiac tissues. This compound is also utilized in the development of therapeutic agents targeting metabolic disorders, such as obesity and diabetes, as it helps regulate the transport of long-chain fatty acids into mitochondria for energy generation. Additionally, it serves as a valuable tool in biochemical assays to investigate carnitine palmitoyltransferase (CPT) activity, which is crucial for understanding metabolic pathways and enzyme function. Its applications extend to cosmetic formulations, where it is used to enhance skin barrier function and improve the delivery of active ingredients.