Amazon.com: NOW Foods Supplements, L Carnitine 1,000 mg, Purest Form, Amino Acid, Fitness Support*, 100 Tablets : Health & Household iSatori Liquid L Carnitine LS3 3000 Carnitine in the crosshairs: A fishy tale? Dr. Ronald Hoffman Gorilla Mode AR L Carnitine Gorilla Mind Amazon.com: ProSupps L Carnitine Liquid 3000, Stimulant Free Liquid Shots for Men & Women Clean Workout Drink for Energy, Performance & Muscle Recovery No Sugar, No Carbs 31 Servings, Berry : 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.