I don't whether you read months back about the man who grew a finger back using pixie dust, a matrix extracted from pig cells. When I read it I was skeptical even when reported by the BBC (here) and other very reputable sources. Anyhow soon after details became clearer and clearer that it seemed to be a finger tip and not bone i.e. we're not dealing with limb replacement. If you're interested the badscience.net website has a good clear critique (be warned the picture is nasty here)Now there is some truth to it all just not the extravagant claims that were made. Matrixes are being made from animal parts such as heart valves. It is simply exaggeration crept in. Some years ago I sliced off the one aspect of my index finger and half the nail, the thumb side. The flesh grew back and the nail grew out slowly covering the wound over about 6-8 weeks. The nail grew faster than normal. I can bear witness to that. But I cringe when people make extravagant claims which are not are not validated. However Evelyn, who I knew, went into hospital for surgery for a tumor clearly identified through ultrasound. However when she recovered from the anesthetic she met two doctors who sheeplishly admitted they couldn't find anything. She said she'd come to realize this incident was about God's care for her and something for her doctors. There are no crazy claims here.
I cringe when I hear people say that believing will solve all your problems, cure all your ills, and you will receive blessing on blessing. The faith of many does not bear witness to that. neither does the Biblical record. Only a few people healed, cured, delivered, and restored. Faith is something intensely personal and you can only truly assess it personally and even then it needs validation in practice and in discernment of spirits. One of my internationals shared on Saturday that God is real, after a year from becoming a Christian he bears witness that God is real. I give thanks for something real and true, because I knew him before and now.