Blood Lead Level
Blood lead measures recent lead exposure. Lead has no biological function — any detectable level represents environmental or occupational exposure. Lead poisoning damages the nervous system, kidneys, blood production, and fertility, and even low-level chronic exposure impairs cognitive development in children. Common Indian sources: old lead-based paint, contaminated kajal and surma, adulterated ayurvedic medicines, lead-glazed pottery, and lead-bearing occupations (battery manufacture, auto repair, painting, plumbing).
Reference Ranges
Male
0 – 5
µg/dL
Female
0 – 5
µg/dL
Child
0 – 3.5
µg/dL
No safe level in children — even <5 µg/dL can affect development
Reference ranges may vary by laboratory. Always compare with the range printed on your lab report.
What Low Levels Mean
A blood lead below the reference level is reassuring — no significant recent exposure is likely. In children, even low-normal values are taken seriously because no threshold is considered safe for neurodevelopment. Sources of potential exposure should still be reviewed if the child has possible risk factors.
What High Levels Mean
Children: ≥5 µg/dL is elevated and triggers source investigation and environmental remediation. Above 45 µg/dL requires chelation therapy (succimer). Adults: 10–25 µg/dL is mild elevation, 25–40 moderate (remove from exposure), and above 50 µg/dL severe (consider chelation). Lead levels above 70 µg/dL are medical emergencies, especially with encephalopathy.
Frequently Asked Questions
What Indian products commonly contain lead?
Traditional kajal and surma (many brands, especially home-made), lead-containing ayurvedic preparations (especially rasa-shastra preparations — legally restricted but still sold), lead-glazed earthenware, some imported cosmetics and toys, old paint in homes and schools, and unregulated water from lead plumbing. Lead is also present in soil near busy roads and former smelting sites.
Should my child be screened for lead?
Universal childhood lead screening is not yet standard in India. Screening is recommended if: regular kajal application, parental occupation with lead exposure, older home with peeling paint, residence near industrial or smelting areas, or use of traditional ayurvedic medicines with rasa-shastra preparations. Global organizations increasingly recommend universal childhood screening — the Indian position is evolving.
How is lead poisoning treated?
First, remove the source of exposure — this is by far the most important step. Mild elevations resolve over months. Severe elevations (>45 µg/dL in children, >50 in adults, or any symptomatic case) require chelation therapy — oral succimer (DMSA) for moderate cases, IV calcium disodium EDTA or dimercaprol for severe or encephalopathic cases. Chelation must be followed by source removal or lead rebounds from bone stores.
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mg/dLThis information is for educational purposes only and should not replace professional medical advice. Always consult your doctor for interpretation of your test results.
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