Our human pluripotent stem cells (hPSC) are continually cultured in our labs. They were originally derived from a 100-200 cell blastocyst (either donated or cloned from a skin-cell). At this very early stage, these cells have not yet become specialized in any way and are capable of signaling repair in all 220+ tissue types of your body, leading to whole body repair and rejuvenation.
Once a particular stem cell line has been established, it can be cultured for many years without losing potency or effectiveness and, most importantly, without the need of additional blastocysts.