New York plastic surgeon Brad Jacobs holds a silicone gel breast implant in 2006. That year the FDA allowed silicone implants back on the market, after a 14- year hiatus. Spencer Platt/Getty Images hide caption

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Yasmin birth control pills are among those that contain drospirenone, a synthetic hormone that appears to carry an elevated risk for blood clots. Gnarls Monkey/Flickr hide caption

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A study found that women's bones didn't benefit from consuming more than 750 milligrams of calcium a day. Justin Sullivan/Getty Images hide caption

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Are BPA-free bottles really safer than the ones that are chock-full of bisphenol A? Good luck trying to find out. David McNew/Getty hide caption

itoggle caption David McNew/Getty