Acetyl L carnitine in chronic pain: A narrative review ScienceDirect Machine learning guided discovery of SLC25A45 as a mediator of mitochondrial methylated amino acid import and carnitine synthesis: Cell Metabolism Frontiers L carnitine attenuated hyperuricemia associated left ventricular remodeling through ameliorating cardiomyocytic lipid deposition l Carnitine l tartrate supplementation favorably affects biochemical markers of recovery from physical exertion in middle aged men and women ScienceDirect Did You Know? Some people report a fishy smell after supplementing with L carnitine. This happens because certain gut bacteria convert carnitine to trimethylamine, a malodorous compound found in rotting fish.