Culture Revolution

The momentum behind probiotic foods seems to be growing in direct proportion to the gray hairs appearing on Baby Boomer temples. That generation started the yogurt boom back in the ’60s, when the tart concoction became a staple of the hip and natural. Since then, they’ve passed it onto their kids and grandkids.

Today, the approximately $3 billion retail market for friendly bacteria is still dominated by yogurt, but signs of change and diversity among product offerings have piqued interest in the …