Optimizing endurance performance in elite swimmers: effects of L carnitine supplementation and hydration strategies Applied Water Science Springer Nature Link CARNITINE (L CARNITINE, ACETYLCARNITINE) Neuroneeds Does Carnitine Cause Body Odor? Lume Deodorant 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. The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation