The fact that you never heard of a pill does not rule it out.If you were actually to go to their website, and study the detailed information , and very long , and essentially transparent and open handling of the studies, you might get a different impresion.It is a natual food, used for over twenty years for its health benefits.They have extracted the essential ingredients and concentrated into a pill form.It just enhances the body's natural tendency to produce stem cells.The most primitive kinds of stem cells as produced by the marrow, have been found as 'becoming' healthy tissue.An overabundance just gets recycled out of the system, but if there is bad tissue,it can help