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Perinatal lead and cadmium burden in a British urban population
Insights
Lead and cadmium levels were measured in mothers and infants during the perinatal period. Breast milk analysis showed low concentrations of these metals, posing a minimal risk for infant exposure.
Area of Science:
- Environmental Health
- Perinatal Toxicology
- Human Nutrition
Background:
- Lead and cadmium are potential environmental pollutants with known health risks.
- Perinatal exposure is a critical window for toxicant accumulation and potential health effects.
- Understanding metal transfer and levels in breast milk is crucial for infant health assessment.
Purpose of the Study:
- To quantify lead and cadmium concentrations in mothers and infants during the perinatal period.
- To analyze lead and cadmium levels in breast milk.
- To assess the risk of infant exposure to lead and cadmium via breast milk.
Main Methods:
- Blood samples from 28 mother-infant pairs were analyzed for lead and cadmium at delivery and postpartum.
- Breast milk was collected and analyzed for lead and cadmium concentrations.
- Iron status was also assessed in the mothers.
Main Results:
- Placental transfer of both lead and cadmium was observed.
- Lead concentrations in breast milk were lower than in commercial formulas.
- Cadmium concentrations in breast milk and commercial formulas were comparable.
Conclusions:
- The risk of excessive lead and cadmium intake from breast milk is considered small.
- Breastfeeding poses a low risk for significant exposure to these specific heavy metals.
- Further research may explore long-term health implications of perinatal metal exposure.
Abstract:
Concentrations of the potential pollutants, lead and cadmium, were studied in the perinatal period in a British urban population. Blood lead and cadmium concentrations and iron status were measured in 28 mother and infant pairs at delivery and at five days postpartum in the mother; breast milk collected at five days postpartum under controlled conditions was analysed for lead and cadmium. Placental transfer of both metals was noted; concentrations of lead in breast milk (mean concentration 0.01 mmol/l (2 micrograms/l) were less than in two brands of commercial prepacked formulas, and the concentration of cadmium in breast milk and prepacked formulas (mean 3.6 nmol/l (0.4 microgram/l] were similar. The risk of excess lead or cadmium intake from breast milk is small.