Does Carnitine Cause Body Odor? Lume Deodorant How to Get Rid of Fishy Smell L Carnitine TikTok 4 Ways to Get Fish Smell off Your Hands wikiHow Cooking fish for dinner has its benefits, but a lingering smell is not one of them. Use these tips from Well+Good founder Melisse Gelula to get the stink out of your kitchen: 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.