Swanson Propionyl-L-Carnitine with Glycine is a dietary ingredient that provides a special form of carnitine used for heart health. PLC (Propionyl L-Carnitine) is used in clinical settings to deliver direct assistance in the production of cardiovascular energy. Propionyl- L-Carnitine with Glycine combines a low dietary dose of PLC with the amino acid glycine, which itself has beneficial effects on heart health. This formula is the latest development in the science of carnitine supplementation, and it's quickly proving itself against other forms. If you use carnitine as part of your cardio-health program, get Propionyl- L-Carnitine with Glycine and give your heart the best.