Milk kefir is the ORIGINAL kefir! It is a fermented drink made by adding milk kefir grains to dairy milk and allowing it to ferment for a couple of days depending on brewing temperature and taste preference. The resulting drink is a tangy, drinkable “yogurt” that makes a terrific base for smoothies or to enjoy on it’s own. You can also ferment a wide range of dairy and non-dairy milks with the grains.