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A Workout Can Change Your DNA

Reporting in Cell Metabolism, researchers write that when people who lead relatively sedentary lives worked out the DNA in their muscle fibers changed almost immediately. Scientists also found caffeine had the same effect on isolated rodent muscles. Study co-author Juleen Zierath discusses the DNA modifications.

FDA: Skin-Lightening Creams Pose Mercury Threat

Some skin-lightening cosmetics contain dangerous amounts of mercury, the FDA warned consumers. Though illegal to sell in the U.S., the foreign-made products are popular in communities where fair skin is considered a mark of beauty.

Forget The Robots: Venture Capitalists Change Their Health Care Investments

As biotech investments and medical device development falters, hospitals are turning to other avenues to help cut costs: streamlining billing systems and investing in simpler medical products.

Women Who Drink Moderately Have Lower Stroke Risk

Women who drink just a bit have a lower risk of stroke than women who don't drink at all, according to a new study. That helps untangle confusion on whether drinking puts people at risk of stroke.

Surgeon General Calls Smoking A 'Pediatric Epidemic'

The U.S. Surgeon General is sounding the alarm about kids and tobacco, saying a lot more has to be done to keep minors from lighting up. Most smokers in high school will smoke as adults, and half of them will die prematurely as a result.