How Much L Carnitine Should I Take? A Guide The Science of Good Health Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum Does L Carnitine Help with Erectile Dysfunction? Acetyl L carnitine is a white crystalline solid that resembles snow. It has a mild odor similar to vinegar. It is a metabolite of L carnitine, derived from the amino acid L lysine in a series 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. L Carnitine Injection Levocarnitine IV