Kefir grains are fermented cultures of yeast and bacteria that clump together with milk protein and complex sugar. They look like small clumps of cauliflower and are added to various kinds of milk to make kefir, a yogurt-like drink.
Kefir grains can be added to cow's milk, goat's milk, soy milk or almond milk to make kefir. It is consumed as a drink or used to make bread, salad dressing or ice cream. Because the cultures in the grain consume lactose, those who are lactose intolerant can consume any form of kefir. The drink itself is said to introduce helpful bacteria cultures to the digestive tract and provide a source of complete protein.