According to medical literature, adult stem cells are undifferentiated cells found throughout the body among the differentiated cells in tissues or organs that can renew themselves and can differentiate to yield some or all of the major specialized cell types of the tissues or organs.
Their primary roles in a living organism are to replenish damaged or aged cells whilst rejuvenating tissue and organs by stimulating the healing process within the body.
The use of adult stem cells in research and therapy pose no ethical or political controversy unlike embryonic stem cells because the production of adult stem cells does not require the destruction of an embryo.
Adult stem cells have been identified in many organs and tissues, including brain, bone marrow, peripheral blood, blood vessels, skeletal muscle, skin, teeth, heart, gut, liver, ovarian epithelium, and testis.
Stem cells may remain quiescent for long periods of time until they are activated by a normal need for more cells to maintain tissues, or by disease or tissue injury.
According to the American Academy of Anti-aging Medicine, stem cells appear to be the most powerful tool in Regenerative Medicine at this time.
In this respect, stem cell therapy has a big potential to regenerate and repair damaged tissue, treat and cure some diseases and even slow down or reversing the inevitable aging process.