CUD Deficiency Primary Carnitine Deficiency Does L Carnitine Help with Erectile Dysfunction? Carnitine Rich Foods: Understanding L Carnitine and Its Benefits Loyal Does Carnitine Cause Body Odor? Lume Deodorant Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum 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.