What Is Grass-Fed Whey Protein Concentrate? Grass-Fed Whey Protein Concentrate is protein derived from left overs from the process of making cheese. Whey contains everything that is soluble in the milk that is left over after the coagulation process and contains only about 5% lactose. Grass-Fed Whey Protein Concentrate is derived from free-range, grass-fed cows. Grass-Fed Whey Protein Concentrate Benefits † Grass-Fed Whey Protein Concentrate is a rich source of protein that may support muscle growth and aid in the recovery of exhausted muscles after anaerobic exercise. This protein powder is also a rich source of leucine and branched-chain amino acids (BCAAs), essential amino acids that are largely found in muscle tissues and used primarily in the production of proteins. May aid muscle recovery Support muscle growth Source of BCAAs Derived from grass-fed cows Made in the USA