Stem cells - engineered ?

Stem Cell research has led us to know that everyone of us has reserves of stem cells in our bodies. Our bodies are able to activate these stem cells when we get the proper nutrition. God gave us all the elements we need to live & be healthy on this earth. On the right track about stem cells, but scary that you think of it as engineering. Wouldn't it be easier to find the natural elements that will activate these stem cells we all posses, instead of engineering the procedure?