This has been contended that over 50 % of the new funds of the Us Federal Institute on Aging was allocated to Alzheimer’s disease problem ( Hayflick 2000a ). Still, new removal of that it medical condition can get just a decreased affect endurance and will not boost the advancing from our very own knowledge of fundamental biology off aging. Deeper notice needs to be made available to a rarely presented matter: why are old tissues more vulnerable to disease than more youthful tissue?