The endogenous lipid anandamide is a full agonist at the human vanilloid receptor (hVR1).
Smart D, Gunthorpe MJ, Jerman JC, Nasir S, Gray J, Muir AI, Chambers JK, Randall AD, Davis JB. The endogenous lipid anandamide is a full agonist at the human vanilloid receptor (hVR1). Br J Pharmacol. 2000 Jan; 129(2):227-30.