Trimethylamine (TMA) is a volatile organic compound produced in the gut by bacterial fermentation of dietary nutrients such as choline, L-carnitine, and lecithin. Normally, TMA is rapidly converted in the liver to trimethylamine N-oxide (TMAO), which is less toxic. However, elevated TMA levels can indicate imbalances in the gut microbiome or impaired liver detoxification capacity. High TMA is also associated with trimethylaminuria, a rare metabolic disorder that causes a strong body odor. Monitoring TMA provides insight into gut microbial activity, protein metabolism, and liver function.
Elevated TMA may signal gut dysbiosis, excessive protein fermentation, or impaired liver conversion of TMA to TMAO.
TMA is produced by gut bacteria from certain dietary nutrients and is later converted by the liver to TMAO. TMAO is more stable and less odorous than TMA.
Yes. Excess TMA can accumulate in the body and cause trimethylaminuria, also known as "fish odor syndrome," due to its strong smell.
Foods rich in choline and carnitine—like eggs, red meat, liver, and certain fish—can increase TMA production.
Not necessarily, but persistently elevated levels may point to liver enzyme issues or gut microbial imbalances that could benefit from further evaluation.