What are the main scientific theories of aging?
In general, I agree with you. But indeed, genetics have the most impact on life expectancy, but everything is in our power and we can change our lives despite the genetic aspects. Japanese eat a lot of fish, but fish is the main source of Omega 3 and many important microelements for our organism. So, that’s why their longevity is better than ours. In addition to proper nutrition, it is very important to maintain a balance of minerals and trace elements in your body. There are many nutritional supplements that are recommended to consume for longevity today (like this thelongevityspecialists.com). And that’s very important to be calm and live without nerves every day. Stress is one of the main things that badly influences our health and longevity.
Aging theories fall into two main categories, programmed and non-programmed. A programmed theory of biological aging also known as adaptive aging, active aging, or aging-by-design proposes that organisms are designed to age and have a limited life span and that aging is purposely caused or allowed by a genetic program similar to the one that controls the development and growth of an organism. According to this concept, aging is an adaptation in that it is an organism design feature that was selected by the evolution process because it benefited the organism. Because a limited life span conveys benefit, organisms can possess potentially complex evolved systems that actively regulate life span.