Lead
Pb · Atomic number 82 · Heavy metal
Lead is a toxic heavy metal with no known safe level of exposure in humans. It accumulates in bone, blood, and soft tissue over time and is particularly damaging to neurological development in children. We test for lead across every product category and report exact levels against regulatory thresholds.
Action level for bottled water. Revised down from 10 ppb in 2020.
Action level triggering treatment. EPA stated goal is zero.
Provisional guideline. WHO states no safe exposure level exists.
Maximum allowable dose level (MADL) for reproductive toxicity.
Reference value for children. Previously 5, reduced in 2021.
No safe level
CDC, WHO, and EPA all state there is no known safe blood lead level in children
Half-life in bone
20–30 years. Lead stored in bone re-enters blood during pregnancy and aging
IQ impact
Every 1 µg/dL increase in blood lead associated with 0.5–1 point IQ decline
Food is #1 source
FDA estimates food accounts for ~80% of lead exposure in adults
How You're Exposed
Routes of exposureIngestion
The primary route. Lead enters food through contaminated soil, processing equipment, packaging, and environmental deposition. Water picks up lead from aging pipes and fixtures.
Inhalation
Lead-containing dust and particulates are inhaled and absorbed through the lungs at 30-50% absorption rate (vs 10-15% for ingestion). Most relevant in homes with deteriorating lead paint.
Dermal & Transfer
Direct skin absorption of inorganic lead is minimal, but hand-to-mouth transfer is a major pathway, particularly for children. Lead in soil, dust, and consumer products contacts skin and is then ingested.
Health Effects
What the research showsNeurological
Critical concernCognitive impairment, lower IQ, behavioral disorders, peripheral neuropathy. Children are 4-5x more vulnerable. Effects are irreversible at any blood lead level.
Cardiovascular
High concernHypertension, increased cardiovascular mortality. Meta-analyses show dose-response relationship starting below current reference levels.
Reproductive
High concernReduced fertility in both sexes, increased miscarriage risk, preterm birth, low birth weight. Lead mobilizes from bone stores during pregnancy.
Kidney & Bone
Moderate concernChronic nephropathy, reduced GFR. Lead substitutes for calcium in bone matrix with 20-30 year half-life. Remobilizes during osteoporosis, pregnancy, and aging.
Where We Find It
12 product categoriesProduct Spotlight
Across all categoriesWater: Hallstein
Lead ND (not detected) across all testing. Deep artesian source at 700ft below Dachstein mountain isolates the water from surface contamination pathways that introduce lead.
View full COASalt: Himalayan Pink (generic)
Multiple independent tests have found detectable lead in generic Himalayan pink salt from the Khewra mine region. Levels vary by brand and batch. Our salt rankings include lead testing for each product.
View salt rankingsReducing Your Exposure
Mitigation & detoxification- •Test your water for lead (use our zip code tool)
- •Choose verified-clean bottled water when unsure
- •Avoid imported ceramic cookware without FDA compliance
- •Use cold water for cooking (hot dissolves more lead from pipes)
- •Run water 30 seconds before first use each day
- •Maintain adequate calcium intake (competes with lead absorption)
- •Ensure iron sufficiency (deficiency increases lead uptake 4-5x)
- •Adequate vitamin C enhances lead excretion
- •Zinc supplementation may reduce lead absorption
- •High-fiber diet increases fecal lead excretion
- •EDTA (CaNa2EDTA): IV chelation for acute/high-level exposure
- •DMSA (Succimer): oral agent approved for pediatric use
- •Only under medical supervision with confirmed elevated BLL
- •Source must be eliminated first or chelation remobilizes stored lead
- •Post-chelation retesting at 2 and 4 weeks recommended
Connected Entities
Related topics in the knowledge graphContaminant
Cadmium (Cd)
Often co-occurs with lead in geological deposits. Accumulates in kidneys.
Contaminant
Arsenic (As)
Fellow heavy metal found in water, rice, and juice. Different mechanism but overlapping food sources.
Contaminant
Mercury (Hg)
Neurotoxic heavy metal primarily from fish and dental amalgams. Synergistic toxicity with lead.
Contaminant
Microplastics
Synthetic particles in water, salt, and food. Different class but overlapping product categories.
Mineral
Calcium (Ca)
Competes with lead for absorption pathways. Adequate intake is a primary defense against lead uptake.
Mineral
Iron (Fe)
Iron deficiency dramatically increases lead absorption. Maintaining sufficiency is a key protective factor.
Compound
EDTA
Primary chelating agent used in clinical lead detoxification. Binds lead in blood for renal excretion.
Compound
DMSA (Succimer)
Oral chelating agent approved for pediatric lead poisoning. Lower side effect profile than EDTA.
Common Questions
FAQIs there a safe level of lead exposure?
No. The CDC, WHO, and EPA all state there is no known safe blood lead level, particularly in children. Even levels below 3.5 µg/dL (the current CDC reference value) have been associated with cognitive effects.
How do I test my blood for lead?
A venous blood draw tested for blood lead level (BLL) is the standard diagnostic. Available through your doctor or direct-to-consumer labs. Cost is typically $30-80. Results above 3.5 µg/dL in children or 5 µg/dL in adults warrant follow-up.
Does cooking in lead-glazed ceramics increase exposure?
Yes, especially with acidic foods (tomato sauce, citrus, vinegar). Lead leaches from glazes when heated or exposed to acid. Most affected: imported, handmade, or antique pottery. Use FDA-compliant cookware.
Should I be concerned about lead in Himalayan salt?
Some samples of Himalayan pink salt contain measurable lead levels. Our salt rankings include lead testing data for each product. Redmond Real Salt and Celtic Sea Salt have tested lower than most Himalayan sources.