Angelina Jolie took a genetic test to find out her risk of breast cancer, and had a preventive double mastectomy. Alastair Grant/PA Photos /Landov hide caption

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A microscopy image of a rat pancreas shows the insulin-making cells in green. Masur/Wikimedia.org hide caption

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Most people polled in a new survey said government programs to make fresh fruits and vegetables more affordable sound like a great idea. iStockphoto.com hide caption

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A performer drinks a soda in Ahmedabad, India in 2010. A study found that rising diabetes prevalence in countries like India is strongly tied to sugar consumption. Sam Panthaky/AFP/Getty Images hide caption

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Health researchers say the proportion of people in their late 40s to 60s with diabetes, hypertension or obesity has increased over the past two decades. iStockphoto.com hide caption

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Cameron Harris, who has had Type 1 diabetes since he was 8 years old, explains the ins and outs of using glucagon for blood sugar lows. Harris hosts a video podcast series called "In Range" on YouTube. Harwood Podcast Network/YouTube hide caption

itoggle caption Harwood Podcast Network/YouTube

Pedometer, an app, keeps track of your steps, distance traveled and calories burned. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR

Karlton Hill, 15, was diagnosed with diabetes when he was 12. He works hard to manage the disease: He jogs and does pushups every day; he takes metformin is very careful about what he eats. Leslie Capo/LSU Health Sciences Center hide caption

itoggle caption Leslie Capo/LSU Health Sciences Center