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Lead in Serum (Mass Concentration)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of lead in your blood serum, often checked to assess exposure to this heavy metal.

Quick summary

["Lead exposure can affect your health, especially in children and pregnant individuals."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
40451-7
Short code
Lead Stl Ql
Synonyms
Lead Stl Ql
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like fatigue, abdominal pain, or neurological issues, or if you’ve been exposed to lead (e.g., from paint, water, or certain jobs). Children are tested more often due to higher sensitivity to lead’s effects on development.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re pregnant or a child, let your provider know to ensure safety and proper interpretation.

What the Results Mean

Higher-than-normal levels may indicate recent or ongoing exposure to lead. Very low levels are usually normal, but consistent high readings warrant further investigation.

Common Causes of Elevated Lead Levels

Exposure can come from contaminated food, water, dust, or environmental sources like old paint or toys. Occupational hazards (e.g., construction, battery recycling) also increase risk.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated lead levels can cause health issues like anemia, developmental delays in children, or damage to organs over time. Chronic exposure may lead to long-term complications.

Short name

Lead Level (Serum)

Frequently asked questions

Could I have been exposed to lead recently?
Yes, if you’ve lived in an older home with peeling paint, used certain household products, or worked in industries involving lead. Recent exposure may show higher levels in this test.
What if my test results are high?
Your provider will discuss next steps, which may include reducing exposure, additional tests, or treatment like chelation therapy if needed. Follow-up visits are important to monitor progress.
Is this test painful?
The blood draw is mild discomfort but brief. Most people tolerate it well. If you’re nervous, ask about numbing cream or other options to ease the process.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy