...Milk is almost always sourced come from cows. Sometimes sheep, goat, yak and water buffalo milk are used. In general, store bough milk comes from a cow, unless specified otherwise. Whole milk is white, or cream colored and has a higher fat content than skim milk and therefore a creamier and richer texture and flavor. The flavor is mild and bland with a hint of savory sweetness and is satisfying, especially due to its creaminess. Milk is served as a beverage and used in a multitude of dishes both sweet and savory.
...Yogurt culture is composed of healthy bacteria. They eat the lactose in the milk; the primary ingredient of yogurt, thereby converting it to lactic acid. Yogurt culture assists in the process of making yogurt thick in texture and tangy in flavor. The culture usually comes in powder form and is white. Yogurt culture is not meant to be consumed directly, but added to milk to make yogurt.