VitaStem Ultra is the only thing I know for a fact. My wife fell on concrete driveway skin tore off her forearm and back of her hand. This was not a simple scratch it was deep. I thought there would be everlasting scares One week later after dressing the wound 3 times and using VitaStem 3 times it's 99% healed. The skin has even grown back. I would not have believed it unless I personally saw the great super fast results in one 1 week for myself. It's worth it's weight in Gold. GLTA $lop$