Trimethylaminuria: Understanding and Treating Fish Odor Syndrome L carnitine supplements can cause a fishy odor in the breath, sweat, and urine. This is likely due to the formation of trimethylamine (TMA). TMA is also responsible for the pungent smell of Trimethylamine N Oxide in Aquatic Foods Journal of Agricultural and Food Chemistry Breakthrough in studying the enzyme that ultimately produces fish odor syndrome EurekAlert! What is Carnitine? Frontiers A mixture of postbiotics tyndallized probiotics reduces trimethylamine (TMA) in trimethylaminuria models: Evidence from in vitro and in vivo studies