The widely used synthetic progestin medroxyprogesterone acetate (MPA) decreased endothelial function in premenopausal women in a study done at the University of Oregon. The finding, researchers said, raises concerns about long-term effects of MPA and possibly other synthetic hormones on vascular health in young women.
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©J. Meendering
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Jessica Meendering, right, works with a young woman who participating in a study of MPA and its effects on the brachial artery.
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