Soda sales have been flattening, but the industry has stepped up marketing and lobbying, according to Marion Nestle in Soda Politics: Taking on Big Soda (And Winning). Akash Ghai/NPR hide caption

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A daily habit of sugary-sweetened drinks can boost your risk of developing the disease — even if you're not overweight. Ryan Kellman/NPR hide caption

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Even If You're Lean, 1 Soda Per Day Ups Your Risk Of Type 2 Diabetes
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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

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You want that soda bottle. But it may not be because you crave soda. It might just be that you love the idea of wrapping your fingers around its enticing shape. Ariel Zambelich/NPR hide caption

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When beverage companies like Pepsi create ad campaigns with stars like Beyonce, they're trying to appeal to youth, says Jennifer Harris of the Rudd Center for Food Policy & Obesity. Walter McBride/Corbis hide caption

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Berkeley's efforts to pass a penny-per-ounce tax on sugary drinks faced opposition with deep pockets — but it also got sizable cash infusions from some big-name donors. Justin Sullivan/Getty Images hide caption

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Would you think twice about that 20-ounce soda if you were informed that it would take 5 miles of walking — or 50 minutes of running — to burn it off? Justin Sullivan/Getty Images hide caption

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Reality Check: To Burn Off A Soda, You'll Have To Run 50 Minutes
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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

toggle caption California Center for Public Health Advocacy

4-MEI, a chemical created during the manufacturing of caramel color used to dye sodas brown, is under new scrutiny. iStockphoto hide caption

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