Guys, they're actually not that different. He's not referring to your basic "PCT" recovery.

He lived a disciplined lifestyle, with healthy diet, herbal supplementation, and top-notch exercise while cutting out toxins. His body healed after that - he gave the body the environment it needed to do it's healing over TIME. Let's not reinvent the wheel here, Grape's situation was most likely just as bad and emotionally/physically damaging as PFS.