Vitamins & minerals
Lead
LOINC 77307-7 · mcg/dL
What it is
Blood lead measures exposure to lead, a toxic metal with no useful role in the body. The goal is to have as little as possible.
Why it matters
It is used to detect and monitor lead exposure, which can affect the nervous system, especially in children.
What high values can mean
A higher value indicates greater lead exposure and a higher risk of harmful effects, prompting a search for the source.
What low values can mean
A lower (or undetectable) value is the goal.
How to improve it
Reducing exposure — old paint, certain water pipes, some imported products or workplaces — is what lowers blood lead.
Food & lifestyle
Adequate iron, calcium and vitamin C may reduce how much lead the body absorbs; avoiding the source is most important.
Preparing for the test
A blood test; fasting is not required — follow your lab's instructions.
When to talk to a doctor
Discuss any detectable lead with a doctor, especially for children or during pregnancy.
Related markers
Sources
- MedlinePlus (NIH)
- CDC
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
See your own values in context
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