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Cadmium exposure and trace elements in human breast milk
Ryumon Honda1, Kenji Tawara, Muneko Nishijo
1Department of Hygiene, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa 920-0293, Japan. ryumon@kanazawa-med.ac.jp
Toxicology
|March 12, 2003
Summary
Cadmium exposure in Japanese mothers may reduce calcium in breast milk, impacting infant growth. This study examined essential mineral interrelations in breast milk and urine to understand cadmium
Area of Science:
- Environmental Health
- Human Nutrition
- Toxicology
Background:
- Human breast milk contains essential minerals crucial for infant development.
- Cadmium (Cd) is a toxic heavy metal with potential health implications.
- Understanding mineral interrelations in breast milk is vital for assessing infant nutritional status.
Purpose of the Study:
- To investigate the interrelations of seven elements (calcium, magnesium, sodium, potassium, phosphorus, copper, zinc) in human breast milk.
- To clarify the effects of cadmium exposure on these essential elements in Japanese mothers.
- To determine if cadmium concentration in breast milk correlates with maternal urinary cadmium levels.
Main Methods:
- Collected breast milk and urine samples from 68 Japanese mothers within 5-8 days postpartum.
- Analyzed elemental concentrations using inductively-coupled plasma atomic emission spectrometry and atomic absorption spectrophotometry.
- Correlated concentrations of cadmium, calcium, magnesium, copper, and zinc in breast milk and urine.
Main Results:
- Cadmium concentration in breast milk significantly correlated with urinary cadmium.
- Positive correlations observed between copper and calcium, copper and magnesium, and zinc and magnesium in breast milk.
- A significant inverse relationship was found between cadmium and calcium concentrations in breast milk.
Conclusions:
- Breast milk cadmium levels reflect maternal cadmium body burden.
- Increased cadmium in breast milk may negatively affect calcium secretion.
- Findings highlight potential nutritional risks for infants due to maternal cadmium exposure.
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