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Study finds link between cholesterol metabolite and breast cancer.  The interesting point of this article is not that statins need to be given to all women to prevent breast cancer, which of course is what many will take.  But, that the cholesterol metabolite, 27-hydroxycholesterol showed ER agonist activity.  This would have to be ER-alpha agonist activity though the authors did not clarify.  The 27-hydroxymetabolite is created from CYP27A1.

Cholesterol metabolite linked to increased breast cancer risk through estrogen receptor signaling.  The metabolite is 27-hydorxycholesterol.