Whey is left over when milk is coagulated. It is one component of the milk protein. The other is casein. The balance between whey and caseins proteins is  1 : 4.
By-product of coagulated milk is curd - milk protein - casein. Then it remains still liquid and it is whey. It has a yellow-green color. And it is raw material used in the production of whey protein. Whey protein is the fastest absorbable source of protein. 

Our protein powders are manufactured by CFM method (Cross Flow Microfiltration).
CFM is natural, non-chemical manufacturing process producing whey protein of the highest quality, filtered on special technologically highly advanced ceramic cross-flow filter that allow perfectly filter our all unwanted substances.
CFM is absolutely natural non-chemical process using no chemicals or dissolving agents.
CFM is the most gentle existing method of protein manufacturing, because the raw ingredient is not manufactured by any factors as high pressure, high temperature or ions. It only goes through ceramic filters by force of its own weight. Its structure, composition, aroma, color and taste are natural, unaltered, in its native form.

WPC 80 is a natural soluble whey protein concentrate manufactured from fresh sweet whey by ultrafiltration and spray drying