How did you think they got the stem cells? By putting them in a blender?
You have to dissect the umbilical cord to extract the anatomical features that contain the highest concentration of stem cells. Google "Wharton's Jelly."
The Bullshit Asymmetry Principle: Brandolini's Law:
THE AMOUNT OF ENERGY REQUIRED TO REFUTE BULLSHIT IS AN ORDER OF MAGNITUDE GREATER THAN THE ENERGY NEEDED TO PRODUCE IT.