Greek yogurt was one of those food products that rocked my world when I finally tried it, and from the first time I tasted it, I've rarely been without some in my fridge. True Greek yogurt (from Greece) is made from sheep's milk, but in most parts of the world the term Greek yogurt has come to mean any extra thick yogurt with the whey strained out, no matter what type of milk is used. It's the creamy thickness of Greek yogurt that makes it so appealing, and even fat free Greek yogurt tastes creamier than regular American yogurt, something that makes it perfect for every type of diet.