Biogerontology is the have a look at of the biological foundation of aging and age-associated illnesses. The phenomenon and the manner of getting old are nicely understood in evolutionary and biological phrases; and a conceptual framework has been installed within which trendy principles of getting older and longevity may be formulated. The phenotype of growing old in terms of progressive lack of physical feature and fitness is first-rate seen throughout the period of survival after the evolution-decided essential lifespan (ELS) of a species. However, the getting older phenotype is surprisingly heterogenous and individualistic in any respect ranges from the entire body to the molecular one. Most significantly, the technique and the development of growing older are not decided by using any specific gerontogenes.