Stem cells are known as the body’s ‘master’ cells because they have the potential to develop into virtually any type of cell in the body. They can replace or repair cells damaged by disease or injury, serve as an ongoing source of the specialized cells that make up organs and tissues and provide a permanent treatment for inherited and chronic conditions affecting many millions of people worldwide.  There are three main types of stem cells: adult stem cells, embryonic stem cells, and induced-pluripotent stem cells, or iPSCs.

NIH: National Institutes of Health