Understanding Mercury: Normal vs Optimal Ranges

?What is Mercury?

Mercury is a toxic heavy metal with no beneficial role in the human body. The main sources of exposure are methylmercury from fish consumption (especially large predatory fish), dental amalgam fillings (elemental mercury), and occupational exposure. Mercury accumulates in the body and is excreted slowly.

!Why It Matters

Chronic mercury exposure damages the nervous system (numbness, tremor, cognitive decline), kidneys, and immune system. Children are particularly vulnerable — prenatal and early childhood exposure impairs neurodevelopment. Fish consumption is the primary route of exposure for most people; high fish consumers may accumulate significant mercury despite recommended intakes.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Peripheral neuropathy, tremor, poor coordination
• Memory problems, confusion, mood changes
• Fatigue, metallic taste in mouth

How to Improve Your Levels

• 1Limit high-mercury fish: shark, swordfish, king mackerel, bigeye tuna
• 2Safer fish choices: salmon, sardines, anchovies, tilapia (lower in mercury)
• 3If elevated: chelation therapy under specialised medical supervision

When to Test

Consider testing for high fish consumers, those with occupational exposure, or unexplained neurological symptoms.

Related Biomarkers