Why Kefir Is More Than Just Another Kind Of Yogurt

There is no shortage of trendy yogurts at the grocery store these days, from quark to labneh, but not all cultured milk is created the same. Most of these foods have existed for as many as thousands of years, and were often methods of preserving milk. Milk kefir, commonly just called kefir, is one example. Originally from Eastern Europe, kefir has gained popularity in the U.S. and is now commercially available at many grocery stores. But to think of kefir as just "drinkable yogurt" is only...