Can it get any worse for Whole Foods?

Organic food has gone mainstream. That's bad news for Whole Foods. But great news for supermarket chain Kroger.

Kroger, which also owns Harris Teeter and Jeffrey "The Dude" Lebowski's favorite grocery store Ralphs, reported strong earnings and sales Friday. And it raised its outlook for the year.

A big reason why Kroger (KR) is doing so well is its Simple Truth brand of natural and organic products. Kroger launched it in 2012. Sales from Simple Truth products hit $1.2 billion in 2014.

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