Heavy Metals 101

The basics you should know, including risks, how to limit exposure, and detoxification tips.

  • What Are Heavy Metals?

    Heavy metals are naturally occurring elements such as mercury, lead, arsenic and cadmium. They are present in soil, water, and air — and can enter the food supply through agriculture, manufacturing, and environmental exposure.

  • Why Do Heavy Metals Matter?

    At elevated or chronic exposure levels in humans, heavy metals may cause neurological decline, impaired kidney function, cardiovascular damage, immune dysfunction, cancer and more.

  • How Do Heavy Metals Enter Products?

    Heavy metals can enter products through soil-grown ingredients, water sources, environmental contamination, or processing equipment. They are often naturally occurring — not intentionally added.

  • Can Heavy Metals Be Tested?

    Yes. Modern laboratory methods can detect heavy metals at extremely low concentrations. A Certificate of Analysis (COA) will report heavy metal concentrations in a product.

How Exposure Is Measured

Heavy metals are typically reported in micrograms (µg) or parts per billion (ppb). For consumer products, risk is evaluated based on the amount consumed per day. Regulatory frameworks such as California Prop 65 establish exposure-based thresholds designed to reduce long-term health risks.

The presence of a heavy metal does not automatically mean a product is unsafe. Context — including daily serving size and cumulative exposure — is critical.

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Are heavy metals always dangerous?

No. Many metals occur naturally in the environment. Risk depends on exposure level and duration.

Why do some products test positive?

Because heavy metals are naturally present in soil and water. Even organic and non-GMO products may contain trace levels.

What is the difference between total mercury and methylmercury?

Total mercury measures all mercury forms combined. Methylmercury is a specific organic form that can bioaccumulate in seafood and is often evaluated separately.

Should I get tested for heavy metals?

If you have specific exposure concerns, speak with a licensed healthcare professional. Blood, urine, or hair analysis may be used depending on context and suspected exposure.