A mock-up of a warning label for sodas and sugary drinks proposed in California by public health advocates. California Center for Public Health Advocacy hide caption

itoggle caption California Center for Public Health Advocacy

Appalachia has a distinct culture of sipping soda constantly throughout the day. "Here in West Virginia, you see people carrying around bottles of Mountain Dew all the time — even at a public health conference," says public health researcher Dana Singer. Jin Lee/Bloomberg via Getty Images hide caption

itoggle caption Jin Lee/Bloomberg via Getty Images

A dental researcher says he's concerned that excessive soda consumption is leading to severe erosion of teeth. iStockphoto.com hide caption

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Researchers say that if the price of soda gets higher, people will drink less of it, which will lead to fewer deaths. Joel Saget/AFP/Getty Images hide caption

itoggle caption Joel Saget/AFP/Getty Images