There is no single cause for breast cancer, but one major factor is estrogen. That's a shocking thought. The same hormone that softens our skin, thickens our hair and fills out our hips and breasts also feeds disfiguring tumors. Rates of breast cancer are highest in developed nations, in part, scientists believe, because with better nutrition we reach menses earlier and menopause later, allowing estrogen to course through our bodies for that much longer.
If there is a bright side to all this, it is that estrogen is now pointing the way to new breast-cancer treatments. One of the most exciting...
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