That refers to collagen that has already been partially broken down so it is easier for us to digest.

The good thing about it is it gives us exactly the peptides we need to build our own collagen. But we do still have to break it down and rebuild it ourselves.

One thing to keep in mind though is that we don't actually replace our collagen that much at all. Unless you go through special procedures to make it happen, like what we are starting to see with regenerative medicine, you are not going to get much effect.