Yogurt (or yoghurt) is a kind of fermented cow's milk. It is created by the voluntary introduction of live cultures, such as L. acidophilus, into milk products. The bacteria convert lactose and galactose into the distinctive yogurt product. America, Europe, and other countries differ in their regulations for what is a healthy amount of culture.
Yogurt is sometimes sweetened with sugar, raisins, rose water, or fruit. It is a refreshing snack that is naturally low in calories and trans fat. It can be used as a substitute for sour cream in many recipes.