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Many new fitness-tracking devices are on display at the Consumer Electronics Show in Las Vegas.
Data from 100,000 people’s ratings and shared photos of 500,000 meals suggests mobile apps could nudge us toward healthier food choices.
A startup blends activity tracking with online incentives in hopes of getting kids into shape.
Implant could be an alternative to gastric bypass surgery.
Social media, Wi-Fi gadgets and a sense of shame keep people motivated.
The weight-loss results have been modest, but the new compound appears to be safer than previous drugs.
Drugs that block blood-vessel growth could tackle obesity.