Lead (Blood) (PB) | LabsVault

What is Lead (Blood)?

Blood lead measures recent exposure to this toxic heavy metal. Lead has no biological function and can accumulate in bones, teeth, and soft tissues. Even low levels can cause health problems, particularly affecting the nervous system, kidneys, and cardiovascular system.

Why is it Tested?

Doctors order blood lead testing for occupational exposure screening, investigation of unexplained neurological symptoms, or routine screening in high-risk populations. It’s also used to monitor workers in lead-related industries and evaluate children with developmental concerns.

Normal Ranges

CDC guidelines for blood lead levels:

Normal: <5 μg/dL
Elevated: 5–10 μg/dL
High: >10 μg/dL

The CDC considers any detectable lead level a concern, as there is no safe level of lead exposure. Lower thresholds apply to children and pregnant women.

Reference ranges vary by authority. Track yours across multiple standards with automatic unit conversions in LabsVault.

What do Abnormal Results Mean?

Abnormal results are not a diagnosis. Always discuss your results with a qualified healthcare provider before making any medical decisions.

Elevated Lead (5-10 μg/dL)

Concerning levels may indicate:

Environmental exposure sources
Occupational exposure
Need for exposure source identification
Enhanced monitoring requirements

High Lead (>10 μg/dL)

Significant exposure suggests:

Active lead poisoning
Immediate intervention needed
Work or environmental hazards
Potential neurological or kidney effects

How to Track Over Time

Blood lead reflects recent exposure (past few months) and decreases as exposure stops. Serial monitoring helps assess intervention effectiveness and ensures levels return to baseline after exposure elimination. Bone lead stores may continue releasing lead for years after exposure ends.

Lead (Blood)