The endothelium is the thin barrier that separates circulating blood from the smooth muscle interior of the artery. Healthy endothelial cells help to maintain a normal cardiovascular system. Aging, poor lifestyle habits and nutrition can lead to endothelial problems. Propionyl-L-Carnitine (PLC) plays an important role in protecting the function and health of endothelial cells.PLC passes across the mitochondrial membrane to supply carnitine directly to the energy-producing organelles of all cells. Carnitine is essential for mitochondrial fatty acid transport and energy production