In this form, whey is not of much benefit to athletes, but with gentle low-temperature processing and filtration, this liquid can be stripped of most of its lactose, fat, cholesterol and water to yield concentrated whey powders containing anywhere from 34 to 89% protein.

Because whey protein concentrate is produced from a liquid as a byproduct of the cheese manufacturing process, it needs to be processed to turn it into anything useable. This process, the boiling and mixing and removing of the non-essential ingredients, is a complicated, painstaking process that takes the liquid from its original form into the final product.

The USDA has many requirements for the production of dry whey protein concentrate. According to their report published in 2003, all manufacturers must adhere to the following guidelines. All plants are to be regularly inspected by the government to insure the safety and cleanliness of the facility. The finished product shall not contain less than 25% or more