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The challenge comes at a time when many Americans are cutting back on sugar due to obesity and diabetes risks. Courtesy of The Coca-Cola Company hide caption

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Courtesy of The Coca-Cola Company

Coca-Cola Offers A Sweet Quest: A Million Bucks To Replace Sugar

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Yo-Yo Dieting May Pose Serious Risks For Heart Patients

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A family sells pastries in Mexico City. As Mexicans' wages have risen, their average daily intake of calories has soared. Meghan Dhaliwal/for NPR hide caption

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Meghan Dhaliwal/for NPR

How Diabetes Got To Be The No. 1 Killer In Mexico

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A new study finds that being overweight may decrease a person's life span. Zena Holloway/Getty Images hide caption

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Zena Holloway/Getty Images

Carrying Some Extra Pounds May Not Be Good After All

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An increasing number of overweight Americans have lost the motivation to diet. enisaksoy/Getty Images hide caption

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enisaksoy/Getty Images

Is Dieting Passe? Study Finds Fewer Overweight People Try To Lose Weight

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A molecular biologist is studying how excess sugar might alter brain chemistry, leading to overeating and eventually, obesity. Veronica Grech/Ikon Images/Getty Images hide caption

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Veronica Grech/Ikon Images/Getty Images

This Scientist Is Trying To Unravel What Sugar Does To The Brain

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