Cell phones have fast become today's do-everything device. As such, they lead the growing pack of handheld gadgets helping people manage their health and food choices. Someone walking the grocery aisles can text “What do U want 4 Dinner?” and key in what they buy, all on the same device. Programs come in many forms and formats. Users of technologically nimble smartphones, such as the BlackBerry and the Palm Treo, can download health and wellness software directly onto their phones. These ...

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