Since stem cells have NO antigens, they are NOT recognized as international with the host system. Based on Dr. Niehans’ established concept, they circulate in the site of ingestion (little intestines) until finally they identify and congregate with the human counterpart from the organ from which they were taken – http://stem-cell-prolotherapy51370.blogprodesign.com/21362542/the-greatest-guide-to-elite-regenerative-stem-cell-specialists