Yes, it is true. WPC is high in lactoferrin. WPI doen't have this, because the lactoferrin is destroyed when it is filtered. Another point to make is that whey protein is not good taken by itself. It gets broken down to rapidly and about 40% of it is used for energy instead of protein storage. It's ideal to have a protein powder that is a mixture of Casein, Egg and Whey. Met-rx is a good protein mix, but it upsets my stomach too much. I have no clue why. I often use GEN's Growth Factor X, or Muscle Link's Muscle Meals. Both very good MRPs.