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Masuo Nakano,Shiro Nakano,Hideo Takekoshi 한국식품영양과학회 2007 Journal of medicinal food Vol.10 No.1
In addition to meeting nutritional requirements, breast milk plays important roles in biodefense for nursing in-fants. Dioxins have been detected at high concentrations in breast milk, raising concerns about disorders in nursing infantscaused by breast milk containing dioxins in Japan. We analyzed dioxin levels in breast milk and maternal blood samples from35 pregnant women in Japan. We also measured immunoglobulin (Ig) A concentrations in breast milk and investigated cor-relations with dioxin concentrations. In addition, 18 of the 35 women took Chlorella pyrenoidosa(Chlorella) supplementsduring pregnancy, and the effects on dioxin and IgA concentrations in breast milk were investigated. Toxic equivalents weresignificantly lower in the breast milk of women taking Chlorellatablets than in the Control group (P. .003). These resultssuggest that Chlorellasupplementation by the mother may reduce transfer of dioxins to the child through breast milk. No sig-nificant correlation was identified between dioxin and IgA concentrations in breast milk in the Control group. It is unlikelythat normal levels of dioxin exposure via food have a remarkable influence on IgA in breast milk. IgA concentrations in breastmilk in the Chlorellagroup were significantly higher than in the Control group (P. .03). Increasing IgA levels in breast milkis considered to be effective for reducing the risk of infection in nursing infants. The present results suggest that Chlorellasupplementation not only reduces dioxin levels in breast milk, but may also have beneficial effects on nursing infants by in-creasing IgA levels in breast milk.