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: Benefits, Uses, Side Effects, and More Govinda Lifecare 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. Does Carnitine Cause Body Odor? Lume Deodorant Is L acetyl carnitine helpful short term If you always smell sweaty, sour, or like onions, you need to check your gut because most body odor starts inside; constipation, yeast overgrowth, and poor bile flow create toxic sweat, so