September 25, 2009
Environmental Chemicals Found In Breast Milk
High levels of persistent environmental chemicals found in breast milk in a population with many male reproductive problems
A comparison of breast milk samples from Denmark and Finland revealed a significant difference in environmental chemicals which have previously been implicated in testicular cancer or in adversely affecting development of the fetal testis in humans and animals. This finding is published Thursday (Sept. 24) in the International Journal of Andrology.
Environmental endocrine disrupting chemicals (EDCs) are commonly found in fatty foods, paints, plasticizers, pesticides, and the byproducts of industrial processes, and in recent studies an association has been shown between some of these agents and male reproductive problems. To investigate whether EDCs could be related to such great differences in reproductive disorders between closely related countries, Konrad Krysiak-Baltyn and colleagues from Denmark, Finland, and Germany measured levels of 121 chemicals in 68 breast milk samples from Denmark and Finland to compare exposure of mothers to EDCs.
With so many chemicals, they used sophisticated, bioinformatics tools to interpret the complex data, and the results showed a clear distinction between the countries.
"We were very surprised to find that some EDC levels, including some dioxins, PCBs and some pesticides, were significantly higher in Denmark than in Finland," said Professor Niels Skakkebaek, a senior member of the research team, based at the University Department of Growth and Reproduction, Rigshospitalet, Denmark. "Our findings reinforce the view that environmental exposure to EDCs may explain some of the temporal and between-country differences in incidence of male reproductive disorders."
"In spite of the findings, I would strongly urge women, including Danish mothers, to continue with breast feeding, which has many beneficial effects for the child," added Skakkebaek.
On the Net: