Greek Yogurt is a strained to remove most of its
whey, resulting in a thicker consistency than normal unstrained
yogurt, while still preserving the distinctive sour taste of
yogurt.Like many types, strained yogurt is often made from milk
enriched by boiling off some water content, or by adding extra
butterfat and powdered milk. In Europe and North America, it is often
made from low-fat or fat-free cow's milk.