Eicosapentaenoyl ethanolamide-d 4 is the deuterium labeled Eicosapentaenoyl ethanolamide. Eicosapentaenoyl ethanolamide, an omega-3 fatty acid, is one of N-acylethanolamines (NAEs). Eicosapentaenoyl ethanolamide is cannabinoid CB1/CB2 receptor agonist. Eicosapentaenoyl ethanolamide acts as a metabolic signal. Eicosapentaenoyl ethanolamide inhibits dietary restriction (DR)-induced lifespan extension in wild type animals and suppresses lifespan extension in a TOR pathway mutant.