According to new research, a large part of your life is determined by your genes. Even if you eat right, exercise daily, and avoid all bad habits, your genes can still determine how long you live. A recent study found that about half of a person’s life expectancy is genetic. Genes may have a greater impact on lifespan than lifestyle and environment. This study was published in Science Journal on January 29.
In this study, data of centuries of twins from Denmark and Sweden was analyzed. Researchers studied the lifespans of identical and nonidentical twins, as well as siblings of American people over the age of 100. It was found that if sudden deaths, deaths from infection, or accidents were removed, the genetic effect became even more pronounced. The relationship between life expectancy in twins showed that the genetic effect is stronger after taking into account deaths from external causes.
Over time, as deaths from infections, violence, and accidents have declined, the role of genes in lifespan has become more clear. Indian experts say that this discovery is important for public health. Dr Anoop Mishra, Chairman, Fortis C-Doc, said that although genes play a major role, poor nutrition, air pollution, and rising rates of diabetes and obesity in India could negate this benefit and accelerate the aging process.
Dr Ambrish Mithal, Chairman, Endocrinology and Diabetes Group, Max Healthcare, said that lifespan is determined by a balance of genetic and environmental factors. “Genes set the upper limit of lifespan, while lifestyle and environment determine how close we get to that limit.” He explained that the environment can turn genes on or off without changing the DNA.
Scientists clarified that this does not mean that lifespan is decided at the time of birth. Nearly half of a person’s lifespan is still influenced by lifestyle, access to healthcare, and living conditions. Researchers say this study could change the debate on aging and lifespan, and also shows how important a role lifestyle and environment play in increasing or decreasing biological age.
