Greek yogurt is a yogurt that has been strained to
remove most of its whey, resulting in a thicker consistency than
unstraned yogurt, while preserving yogurt's distinctive sour taste. Like
many types of yogurt, strained yogurt is often made from milk thathas
been enriched by boiling off some of its water content, or by adding
extra butterfat and powdered milk. In Europe and North America, it is
often made with low-fat or fat-free yogurt. In Iceland a similar product
named skyr is produced.