A question best left unanswered.
Actually, most, if not all, Metas have a healing factor. Of course, that varies from one Meta to another, one might be able to recover from a broken bone in mere minutes, while the other may take a few days. But it’ll always be a lot faster than a regular human.
In fact, most Metas are far more advanced than humans in terms of physical and mental aspects, since they are all enhanced. Not all enhancements are the same; one Meta might have a more enhanced intelligence than another, who has more strength than the first Meta. But, compared to humans, they are physically and mentally superior.