Does Carnitine Cause Body Odor? Lume Deodorant Trimethylaminuria: Understanding and Treating Fish Odor Syndrome IV Carnitine Therapy Energy Boost & Metabolism Support Minnerva Clinic Get Rid of Fishy L Carnitine Smell: Essential Fixes 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. Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link