I think we hit the target dead-on for our protein powder want list. First, I can't imagine this lab making something that's not as accurate as they can get with the ingredients. Other than that, what's on the label is in the bottle.
Whey protein is absorbed very quickly and casein is absorbed slower.
There's a bit of internet conversation about that, and in fact that was why we consulted a protein expert to get the straight story and have the formula reviewed. It seems that some believe that casein is cheaper and that's why a manufacturer might choose to add it to the whey, making a less expensive product to manufacture. We weren't able to do that because calcium caseinate gets too gummy, potassium caseinate is too bitter, and sodium caseinate has too much sodium. We went as high as we could comfortably get with the calcium caseinate and decided that's good enough. Protein technology is pretty advanced.