Numerous medical studies show that umbilical cord tissue mesenchymal stem cells have a faster doubling time than adult mesenchymal stem cells (because they are younger and contain a higher concentration of growth factors). The fitness of adult mesenchymal stem cells declines with age and the number of MSC’s we have in our bodies also declines with age. Thus, cord tissue mesenchymal stem cells will have greater fitness than older adult mesenchymal stem cells (as well as a different profile of growth factors), and there will be more of them. Younger cells, like the ones found in the umbilical cord, are more energetic in the body and have a better chance of being more effective.