If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. Amazon.com: VMI Sports L Carnitine 1500 Heat Stimulant Free Thermogenic Metabolic Support & Fat Loss for Men & Women 1500mg L Carnitine Convenient Liquid (Peach Mango) : Health & Household Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum 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. What are the effects and side effects of using L Carnitine IM?