Stabilizing the enzyme in fish odor syndrome Chocolate boosts happiness by increasing serotonin, a neurotransmitter that regulates mood and promotes calmness, and endorphins, the body's natural painkillers that create a sense of euphoria and reduce stress. A recurring fishy odor could indicate a larger medical problem. 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. 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 L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum