adults stem cell
In the past, multipotency and monopotency were considered to be the major drawbacks of adult stem cells, since this limited their ability to transdifferentiate. However, now that a wider capacity for transdifferentiation has been demonstrated in adult stem cells, with some of them exhibiting pluripotency, this previously perceived disadvantage no longer exists.
Risks:
Since a certain amount of genetic damage is normal with aging, the older an adult stem cell is, the greater the odds that it may have incurred some genetic damage. Additionally, if the donor and recipient are not the same person, there may exist the possibility of immune rejection of the cells by the host.