L Carnitine Is it Worth Taking? Ideal Nutrition Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis L Carnitine Benefits for Fat Burning and How to Use ICONFIT 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. Amazon.com: Vital Nutrients Acetyl L Carnitine Powder Brain, Memory, and Cognitive Support Supplement Vegan Gluten, Dairy, Soy Free Non GMO 100 Grams : Health & Household