Food and Drug Administration Commissioner Dr. Margaret Hamburg in a photo taken last May. Hamburg, who has been in the top FDA job for nearly six years, will reportedly step down. J. David Ake/AP hide caption

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The problem isn't just that fake cures are worthless, doctors say. Fraudulent claims also give some people the false sense that the product can protect them from getting sick. iStockphoto hide caption

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Even versions of Zi Xiu Tang Bee Pollen labeled "genuine" and "anti-counterfeit" have been found to contain the drug sibutramine, which was supposed to come off the U.S. market in 2010 for safety reasons. Food and Drug Administration hide caption

itoggle caption Food and Drug Administration

The newly approved Harvoni tablets bring several advances to the fight against hepatitis C, but they also have a steep price tag, reported at $1,125 for a single dose. Gilead Sciences hide caption

itoggle caption Gilead Sciences

A customer shops for produce at the Hunger Mountain Co-op in April 2013 in Montpelier, Vt. More than a dozen food cooperatives supported the bill that would require the labeling of genetically modified foods. Toby Talbot/AP hide caption

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Up till now, all babies have had two genetic parents. That could soon change. Klöpper & Eisenschmidt GbR/iStockphoto hide caption

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Blair Roberts, a 22-year-old sales associate at Colorado E-Smokes, "vapes" with an electronic cigarette in the Aurora, Colo., store. In the absence of federal rules, Colorado is among states that considered its own age requirements for the nicotine-delivery devices. Ed Andrieski/AP hide caption

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The prescription painkiller sold under the brand-name Vicodin contains hydrocodone bitartrate and acetaminophen. To reduce the risk of liver damage, the Food and Drug Administration is moving to limit the amount of acetaminophen allowed in prescription medicines. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP