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Will Gathering Vast Troves of Information Really Lead To Better Health?

Scientist Michael Joyner rides his bike to work every day because he believes the exercise has more of an impact on people's BMI than their genetic profile. (Richard Harris/NPR)
Scientist Michael Joyner rides his bike to work every day because he believes the exercise has more of an impact on people's BMI than their genetic profile. (Richard Harris/NPR)

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