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. Vaginal epithelial dysfunction is mediated by the microbiome, metabolome, and mTOR signaling: Cell Reports Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota Balancing the Equation: A Natural History of Trimethylamine and TrimethylamineNoxide ScienceDirect Stabilizing the enzyme in fish odor syndrome