BOSTON (CBS) – Boston-based RunKeeper took another step toward establishing itself as a global platform for fitness and wellness data this week with its new “healthy” button which will work much like Facebook’s “like” button.

PowerBar and Stonyfield Farm are among about a half dozen companies who’ve signed up to get the healthy button on their websites.

If a website visitor clicks on the healthy button, it broadcasts their approval of a product or a service to their friends on Runkeeper’s site.

RunKeeper had been testing out the button on its own site.

RunKeeper first started off as an iPhone app for runners but is planning to become a global fitness platform.

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