Quick Answer: What Are The Signs And Symptoms Of Trimethylaminuria?


Trimethylaminuria is characterized primarily by a fishy odor that occurs when excess trimethylamine is released in the person’s sweat, urine, reproductive fluids, and breath.

Although some affected people may have a constant strong odor, most have a moderate odor that can vary in intensity.

How do I know if I have Trimethylaminuria?

Trimethylaminuria is diagnosed with a urine test that measures the ratio of trimethylamine (the fishy-smelling chemical) to trimethylamine N-oxide (the odourless version). The test involves taking choline tablets and collecting several urine samples over the 24-hour period that follows.

Is Trimethylaminuria a disability?

Trimethylaminuria, commonly known as fish-odor syndrome, is a rare condition impacting a sufferer’s ability to break down a pungently scented chemical compound, naturally occurring in the body, called trimethylamine.

What are the causes of Trimethylaminuria?

Although FMO3 gene mutations account for most cases of trimethylaminuria, the condition can also be caused by other factors. The strong body odor may result from an excess of certain proteins in the diet or from an abnormal increase in bacteria that produce trimethylamine in the digestive system.

What foods should be avoided with TMAU?

It can help to avoid certain foods that make the smell worse, such as:

  • cows’ milk.
  • seafood and shellfish – freshwater fish is fine.
  • eggs.
  • beans.
  • peanuts.
  • liver and kidney.
  • supplements containing lecithin.