http://bubbleandbee.blogspot.com/2009/09/lavender-tea-tree-estrogenic.html"But what about the laboratory tests they did on petri dishes of human cells? If you look carefully at their study, you'll notice they didn't apply pure lavender or tea tree essential oil on the cells they were testing, they used a solvent to dilute the oils. The solvent is dimethylsulfoxide---which, as it turns out, is an estrogen mimicker!"
http://www.canada.com/montrealgazette/story.html?id=8e437f28-9fce-4a80-81a8-02a8097d9898"Take lavender-scented soaps and lotions, for example. These have been linked with breast growth in young boys. It turns out lavender oil activates estrogen regulating genes in human breast cells. Alfalfa sprout extracts display increased breast cancer cell proliferation above levels seen with estradiol, an estrogen. Soybeans contain natural estrogenic compounds, and so does milk. Milk represents a far greater estrogenic exposure than we experience from BPA. Our average daily intake of estrogens through milk is about 370 nanograms, 20 times greater than the amount of BPA found in a litre of water consumed from a polycarbonate baby bottle. Nobody suggests banning milk even though it contains a good dose of estrogenic compounds. Neither should they.
That’s not all. Nonylphenol, an ingredient in numerous detergents, is estrogenic. It ends up in sewage, along with natural estrogens and birth control pill remnants excreted by women. Sewage treatment plants do not remove these substances and they can end up in surface water as well as in ground water when sewage sludge is spread on fields as fertilizer.
We are awash in a sea of both natural and synthetic hormone disrupting substances and it is unrealistic to accuse a specific one of being the devil. This does not mean we should be cavalier about hormone-like substances in the environment."