From a scientist's perspective, aging is not just an external phenomenon; it is a complex series of biological changes occurring internally. The gradual deterioration of DNA, proteins, and cells leads to a point where they can no longer function or regenerate. Research and various theories continue to seek answers as to why we age, with the hope of extending our lifespan as much as possible.

For example, here are 2 reasons that have been identified as causes of aging. Let's see how true they are.

Reason 1: Organisms Age

          Research shows that the mechanisms for DNA repair decrease as we age. Many age-related diseases arise from deficiencies in DNA repair. When the genome is damaged, cells deteriorate as well, leading to the shortening of telomeres, the protective ends of chromosomes, as we grow older. Eventually, cells gradually decline and die. Additionally, telomeres are sensitive to DNA damage, and studies in mice have found that damaged telomeres contribute to a shorter lifespan, which in humans can increase the risk of cancer.

Reason 2: Biological Program

          Researcher Steve Horvath from UCLA views aging as a biological program embedded in our DNA, which outlines specific milestones we must reach in life. However, various factors determine when we reach these milestones. For instance, individuals under more stress may reach these points earlier or age more quickly. Meanwhile, other researchers, like Richard Miller from the University of Michigan, argue that while we may be programmed for aging, it is not as rigid as a time bomb, as humans do not have a strictly defined life cycle like some animals.

 

Thank you for the information from www.thaihealth.or.th