In June of this year, the Government Employee Health Association (GEHA), Independence, Mo., the nation’s second-largest health plan for civilian federal employees and retirees, enrolled 1,500 members in a virtual weight loss management program that it says was successful with nearly 80 percent of participants in 2012. That’s a significant milestone, because it demonstrates that a Web-based technology can be an effective and relatively low-cost way for individuals to lower their health risks.

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