What is Cardarine? GW501516 (also known as GW-501,516, GW1516, GSK-516, Cardarine, and on the black market as Endurobol) A PPAR, which stands for the peroxisome proliferator-activated receptor, usually are drugs used for lowering the amount of blood sugar found in the body. So there is some common misunderstandings about the classification of this drug, regarding whether it is an SARM …