Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to The 5 Best L Arginine Supplements Myprotein L Carnitine Tablets 1000mg High Strength Carnitine Supplement Amino Acid Support for Muscle Growth, Recovery & Performance Suitable for Vegans & Vegetarians 180 Count : Amazon.co.uk: Health & Personal Care 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.