Heavy metal testing: should I be tested?

Heavy metal toxicity (lead, mercury, arsenic, and others)

Heavy metal toxicity is real. Lead, mercury, and some other metals can genuinely harm the body. This happens with a real exposure. Examples include old lead paint, certain imported products, some jobs, or eating a lot of high-mercury fish. If you have one of these exposures, testing makes sense. Blood or urine tests can check lead or mercury levels. The type of test depends on the type of exposure. Some tests sold for 'toxic burden' are different. These include hair mineral analysis and 'provoked' urine metal tests, done after a chelation drug. These are not reliable. They often give a false 'high' reading, even in healthy people. Dental fillings with mercury are not a reason for concern or testing. If you are worried about an exposure, tell your doctor the details. That helps pick the right test.

"Pyroluria" (pyrrole disorder)

Not a recognized medical diagnosis — here’s what it usually means and what to ask about instead.

You may have heard of 'pyroluria,' also called pyrrole disorder. Some practitioners test urine for a substance called HPL. They say a high result explains anxiety, mood problems, or fatigue. They often recommend high-dose zinc and vitamin B6. This idea has been studied since the 1960s. A recent, careful review looked at all the research. It found very few good studies. Most did not show a clear link between HPL and mental health symptoms. No controlled trial has tested whether the recommended treatment actually works. Experts do not recommend this test for screening or treatment. Your anxiety, mood, or tiredness is still real. It deserves care, just not through this test. If a real zinc deficiency is suspected, a direct zinc blood test is the better path.