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There is no end to the tricks that endocrine disruptors can play on our bodies: increasing production of certain hormones; decreasing production of others; imitating hormones; turning one hormone into another; interfering with hormone signaling; telling cells to die prematurely; competing with essential nutrients; binding to essential hormones; accumulating in organs that produce hormones.

Here are 12 of the worst hormone disrupters, how they do their dirty deeds, and some tips on how to avoid them.

BPA

Some may say that imitation is the sincerest form of flattery, but do you really want a chemical used in plastics imitating the sex hormone estrogen in your body? No! Unfortunately, this synthetic hormone can trick the body into thinking it’s the real thing – and the results aren’t pretty. BPA has been linked to everything from breast and others cancers to reproductive problems, obesity, early puberty and heart disease, and according to government tests, 93 percent of Americans have BPA in their bodies!

How to avoid it? Go fresh instead of canned – many food cans are lined with BPA – or research which companies don’t use BPA or similar chemicals in their products. Say no to receipts, since thermal paper is often coated with BPA. And avoid plastics marked with a “PC,” for polycarbonate, or recycling label #7. Not all of these plastics contain BPA, but many do – and it’s better safe than sorry when it comes to keeping synthetic hormones out of your body. For more tips, check out: www.ewg.org/bpa/

Dioxin

Dioxins are multi-taskers  but not in a good way! They form during many industrial processes when chlorine or bromine are burned in the presence of carbon and oxygen. Dioxins can disrupt the delicate ways that both male and female sex hormone signaling occurs in the body. This is a bad thing! Here’s why: Recent research has shown that exposure to low levels of dioxin in the womb and early in life can both permanently affect sperm quality and lower the sperm count in men during their prime reproductive years. But that’s not all! Dioxins are very long-lived, build up both in the body and in the food chain, are powerful carcinogens and can also affect the immune and reproductive systems.

How to avoid it? That’s pretty difficult, since the ongoing industrial release of dioxin has meant that the American food supply is widely contaminated. Products including meat, fish, milk, eggs and butter are most likely to be contaminated, but you can cut down on your exposure by eating fewer animal products.

Atrazine

What happens when you introduce highly toxic chemicals into nature and turn your back? For one thing, feminization of male frogs. That’s right, researchers have found that exposure to even low levels of the herbicide atrazine can turn male frogs into females that produce completely viable eggs. Atrazine is widely used on the majority of corn crops in the United States, and consequently it’s a pervasive drinking water contaminant. Atrazine has been linked to breast tumors, delayed puberty and prostate inflammation in animals, and some research has linked it to prostate cancer in people.

How to avoid it? Buy organic produce and get a drinking water filter certified to remove atrazine. For help finding a suitable filter, check out EWG’s buying guide: www.ewg.org/report/ewgs-water-filter-buying-guide/