Dioxins Impair Breastfeeding

Ken Hammond, USDA

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Exposure to dioxins during pregnancy harms the cells in breast tissue which in turn impairs the ability to initiate breastfeeding or to produce enough milk.

The data are demonstrated only in mice at this point. But the researchers from the U of Rochester Medical Center believe dioxin exposure may account for at least some of the 3 to 6 million mothers worldwide who cannot breastfeed.

The study is published online in Toxicological Sciences and shows that dioxin has a profound effect on breast tissue by causing mammary cells to stop their natural cycle of proliferation as early as six days into pregnancy and lasting through mid-pregnancy. Exposure to dioxin causes mice to produce 50 percent fewer new epithelial cells. Normally mammary glands cells proliferate rapidly during early to mid-pregnancy. Dioxin also alters the induction of milk-producing genes that occurs around the ninth day of pregnancy.

Dioxins are generated by the incineration of municipal and medical waste, especially plastics, and emitted through the air to settle onto crops, pastures, and waterways. People acquire the toxins through eating contaminated meat, dairy products, fish, and shellfish. The toxin settles in the fatty tissues and natural elimination occurs extremely slowly.

The team is looking into whether the harm occurs directly in the breast or if it’s found throughout the body but manifests uniquely in the fatty mammary tissue. They’re also studying a hypothesis that dioxin exposure might cancel the protection pregnancy normally awards against breast cancer.

Makes the UN’s call to ban all plastic bags seem farsighted. So how about banning municipal- and medical-waste incinerators?

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

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Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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