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Secrets of Aging, Long Life, longevity Genes

July 11th, 2015 4:46 pm

Is there a maximum biological limit to the human life span of somewhere around 120 years?

Could we live much longer, given the right conditions?

Answers to these and other fundamental questions about aging may now be within reach.

IS THERE AN AGE LIMIT?

One hundred and twenty years, as far as we know, is the longest that anyone has ever lived. A man in Japan, Shirechiyo Izumi, reached the age of 120 years, 237 days in 1986, according to documents that most experts think are authentic. He died after developing pneumonia.

Long lives always make us wonder: What is the secret? Does it lie in the genes? Is it where people live or the way they live -- something they do or do not do? Eat or do not eat? Most of the scientists who study aging, gerontologists, say the secret probably lies in all of the above -- heredity, environment, and lifestyle.

But gerontologists also ask other and more difficult questions. For example, if the 120-year-old had not finally succumbed to illness, could he have lived on and on? Or was he approaching some built-in, biological limit? Is there a maximum human life span beyond which we cannot live no matter how optimal our environment or favorable our genes?

Whether or not there is such a limit, what happens as we age? What are the dynamics of this process and how do they make life spans short, average, or long? Once we understand these dynamics, could they be used to extend everyone's life span to 120 or even, as some scientists speculate, to much greater ages?

And finally for all of us, the most important question: How can insights into longevity be used to fight the diseases and disabilities associated with old age to make sure this period of life is healthy, active, and independent?

In Search of the Secrets of Aging describes what we know so far about the answers to these questions and what we want to know. It gives an overview of research on aging and longevity, showing the major puzzle pieces already in place and, to the extent possible, the shapes of those that are missing.

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Secrets of Aging, Long Life, longevity Genes

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