Powerful growth factors from pig tissue have been used to heal a US marine who lost most of the muscle in his upper leg in a mortar attack:
US soldier Isaias Hernandez 're-grows leg' after pig bladder hormone injection | Mail Online
I think this technology could be revolutionary, if it gets used by mainstream medical science. What about even more lucrative medical niche areas, like athletic medicine and performance enhancement for professional competitive athletes? I'm sure those industries could come up with plenty of high-paying customers, and research funding.