GPLC is a propionyl ester of carnitine (PLC) that includes an additional glycine component. Compared with other forms of carnitine, PLC executes its powerful effects on muscle tissues, including the heart.

GPLC exerts powerful antioxidant effects against superoxide radicals and it limits lipid peroxidation. It plays an important role in energy production by acting as a vehicle for the transport of fatty acids into the mitochondria and as a vehicle for the removal of waste substances out of the mitochondria. GPLC maximizes muscle function by compensating for reduced oxygen availability during times of physical exertion and it offers powerful support for arterial blood flow. Under reduced oxygen conditions, GPLC also supports normal carbohydrate metabolism and minimizes lactic acid buildup.