This statement (put out by the manufacturer), and a couple of other statements (also put out by them) are the only things I've seen so far.
It isn't something that interests me, personally....
"Velositol is a patented combination of amylopectin and chromium that is designed to work as a perfect partner to protein. Velositol's highly soluble amylopectin stimulates insulin's safe and controlled release, while chromium enhances insulin function and increases muscle cells' sensitivity to it. Together, these nutrients enhance insulin's ability to transport amino acids into muscle cells where they supply the nutrients needed for MPS."