(5Z,8Z)-Tetradecadienoylcarnitine-13C3 is carbon-13 labeled(5Z,8Z)-Tetradecadienoylcarnitine (T291685), which is an acyl carnitine. Acryl carnitines are important metabolite involved withglucose and lipid metabolism and commonly used to screen for fatty acid oxidation defects in human. Studies suggest that accumulation of acylcarnitines may associate withinsulin resistance. In addition,(5Z,8Z)-Tetradecadienoylcarnitine can be used in tandem mass spectrometric analysis for amino, organic, and fatty acid disorders in newborn dried blood spots.