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. L Carnitine Side Effects & Safety: A Complete Guide The Science of Good Health L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Is L Carnitine Safe? Watch FIRST BEFORE Taking L Carnitine Supplements L Carnitine: Benefits, side effects, and dosage